Agriculture is the art of cultivating the ground, more especially with the plough and in large areas or fields, in order to raise grain and other crops for man and beast; including the art of preparing the soil, sowing and planting seeds, removing the crops, and also the raising and feeding of cattle or other live stock. This art is the basis of all other arts, and in all countries coeval with the first dawn of civilization. At how remote a period it must have been successfully practised in Egypt, Mesopotamia, and China we have no means of knowing, but archaeologists have found evidence of agriculture being practised around 7000 BC. Egypt was renowned as a corn country in the time of the Jewish patriarchs, who themselves were keepers of flocks and herds rather than tillers of the soil. Naturally very little is known of the methods and details of agriculture in early times, though field archaeologists at Butser Ancient Farm in Hampshire have been conducting experiments for some years.
Among the ancient Greeks the implements of agriculture were very few and simple. Hesiod, who wrote a poem on agriculture as early as the eighth century BC, mentions a plough consisting of three parts, the share-beam, the draught-pole, and the plough-tail, but antiquarians are not agreed as to its exact form. The ground received three ploughings, one in autumn, another in spring, and a third immediately before sowing the seed. Manures were applied, and the advantage of mixing soils, as sand with clay or clay with sand, was understood. Seed was sown by hand, and covered with a rake. Grain was reaped with a sickle, bound in sheaves, thrashed, then winnowed by wind, laid in chests, bins, or granaries, and taken out as wanted by the family, to be ground.
Agriculture was highly esteemed among the ancient Romans. Cato, the censor, who was celebrated as a statesman, orator, and general, derived his highest honours from having written a voluminous work on agriculture. In his Georgics Virgil has thought the subject of agriculture worthy of being treated in the most graceful and harmoniousverse. The Romans used a great many different implements of agriculture. The plough is represented by Cato as of two kinds, one for strong, the other for light soils. Yarro mentions one with two mould-boards, with which, he says, 'when they plough, after sowing the seed, they are said to ridge'. Pliny mentions a plough with one mould-board, and others with a coulter, of which he says there were many kinds. Fallowing was a practice rarely deviated from by the Romans. In most cases a fallow and a year's crop succeeded each other. Manure was collected from nearly or quite as many sources as have been resorted to by the moderns. Irrigation on a large scale was applied both to arable and grasslands.
The Romans introduced their agricultural knowledge among the Britons, though it is known that the Britons were already practising agriculture, and during the most flourishing period of the Roman occupation large quantities of corn were exported from Britain to the Continent. During the time that the Angles and Saxons were extending their conquests over the country agriculture may have been neglected; but afterwards it was practised with some success among the Anglo-Saxon population, especially, as was generally the case during the middle ages, on lands belonging to the church. Swine formed at this time a most important portion of the live stock, finding plenty of oak and beech mast to eat.
The feudal system introduced by the Normans, though beneficial in some respects as tending to ensure the personal security of individuals, operated powerfully against progress in agricultural improvements. War and the chase, the two ancient and deadliest foes of husbandry, formed the most prominent occupations of the Norman princes and nobles. Thriving villages and smiling fields were converted into deer forests, vexatious imposts were laid on the farmers, and the serfs had no interest in the cultivation of the soil. But the monks of every monastery retained such of their lands as they could most conveniently take charge of, and these they cultivated with great care, under their own inspection, and frequently with their own hands. The various operations of husbandry, such as manuring, ploughing, sowing, harrowing, reaping, thrashing, winnowing, etc, are incidentally mentioned by the writers of those days; but it is impossible to collect from them a definite account of the manner in which those operations were performed.
The first English treatise on husbandry and the best of the early works on the subject was published in the reign of Henry VIII in 1534, by Sir A Fitzherbert, judge of the Common Pleas. It is entitled the Book of Husbandry, and contains directions for draining, clearing, and inclosing a farm, for enriching the soil, and rendering it fit for tillage. Lime, marl, and fallowing are strongly recommended. The subject of agriculture attained some prominence during the reign of Elizabeth I. The principal writers of that period were Tusser, Googe, and Sir Hugh Platt. Tusser's Five Hundredth Points of Good Husbandry (first complete edition published in 1580) conveys much useful instruction in metre, but few works of this time contain much that is original or valuable.
The first half of the seventeenth century produced no systematic work on agriculture, though several on different branches of the subject. About 1645 the field cultivation of red clover was introduced into England, the merit of this improvement being due to Sir Richard Weston, author of a Discourse on the Husbandry of Brabant and Flanders. The Dutch had devoted much attention to the improvement of winter roots, and also to the cultivation of clover and other artificial grasses, and the farmers and proprietors of England soon saw the advantages to be derived from their introduction. The cultivation of clover soon spread, and Sir Richard Weston seems also to have introduced turnips. Potatoes had been introduced during the latter part of the sixteenth century, but were not for long in general cultivation. A number of writers on agriculture appeared in England during the Commonwealth, the most important works on the subject being Blythe's Improver Improved and Hartlib's Legacy. The former writer speaks of a rotation, or rather alternation of crops, and well knew the use of lime, as also of other manures. In the eighteenth century the first name of importance in British agriculture is that of Jethro Tull, a gentleman of Berkshire, who began to drillwheat and other crops about the year 1701, and whose Horse-hoeing Husbandry was published in 1731.
Jethro Tull was a great advocate of the system of sowing crops in rows or drills with an interval between every two or three rows wide enough to allow of ploughing or hoeing to be carried on. After the time of Jethro Tull's publication no great alteration in British agriculture took place, until Robert Bakewell and others effected some important improvements in the breeds of cattle, sheep, and swine, in the latter half of the eighteenth century. The raising and maintenance of live stock, especially of sheep, was a characteristic of English farming from a very early time, and for several centuries the country had almost a monopoly in the supply of wool. To Bakewell we owe the breed of Leicestersheep. By the end of the nineteenth century it was a common practice to alternate green crops with grain crops, instead of exhausting the land with a number of successive crops of corn. A well-known writer on agriculture at this period, and one who did a great deal of good in diffusing a knowledge of the subject, was Arthur Young.
Scotland was for a long time behind England in agricultural progress. Great progress was made during the eighteenth century, however, especially in the latter half of it, turnips being introduced as a field-crop, and new implements such as the swing-plough and the thrashing-machine coming into general use. The construction of good roads through the country also gave agriculture a great impulse. During the wars caused by the French revolution of 1795 to 1814 the high price of agricultural produce led to an extraordinary improvement in agriculture all over Britain. The establishment of the institution called the National Board of Agriculture was also of very great service to British husbandry at this period. Though a private association it was assisted by an annual parliamentary grant, and prizes were given by it for the encouragement of experiments and improvements in agriculture. It existed from 1793 to 1816.
Among other societies which have greatly furthered the progress of agriculture in Britain, the chief are the Royal Agricultural Society of England, established in 1838; the Highland and Agricultural Society of Scotland, founded in 1783; and the Royal Agricultural Society of Ireland, instituted in 1841. The objects of these and similar societies were such as the following: to encourage the introduction of improvements in agriculture; to encourage the improvement of agricultural implements and farm buildings; the application of chemistry to agriculture; the destruction of insects injurious to vegetation; to promote the discovery and adoption of new varieties of grain, or other useful vegetables; to collect information regarding the management of woods, plantations, and fences; to improve the education of those supported by the cultivation of the soil; to improve the veterinary art; to improve the breeds of live stock, etc. Shows are held, at which prizes are distributed for live stock, implements, and farm produce.
Through the efforts of the above-mentioned and other societies, the investigations of scientific men, the general diffusion of knowledge among all classes, and the necessity of competing with producers in foreign countries, agriculture made vast strides in Britain during the nineteenth century. Among the chief improvements were deep ploughing and thoroughdraining By the introduction of new or improved implements the labour necessary to the carrying out of agricultural operations was greatly diminished, as by the steam thrashing-machine, the steam-plough, and the reaping-machine. The nineteenth century saw also the introduction of chemistry into agriculture in Britain. The organization of plants, the primary elements of which they are composed, the food on which they live, and the constituents of soils, were all investigated, and most important results obtained particularly with regard to manures and rotations. Artificial manures, in great variety to supply the elements wanted for plant growth, came into common use at the end of the nineteenth century, not only increasing the produce of lands previously cultivated, but extending the limits of cultivation itself. An improvement in all kinds of stock became more and more general, feeding was conducted on more scientific principles, and improved varieties of plants used as field crops were introduced at the same time. At the end of the nineteenth century was introduced the system of ensilage for preserving fodder in a green state. However, by the start of the 20th century writers were proclaiming that, chiefly owing to foreign competition, agriculture had become a very unprofitable industry in Britain.
It is only since the nineteenth century that much progress was made in perfecting implements and machinery for cultivating the soil, sowing seed, drilling, rolling, hoeing, reaping, digging, etc. The first application of steam to ploughing dates from 1770, when Richard Edgeworth took out a patent for a steam ploughing machine, but it was 1852 before such application proved of any economic value. As early as 1829 a reaping-machine was invented by the Reverend Mr. Bell of Carmylie, Forfarshire, which, in an improved form, was still in use at the start of the twentieth century when numerous mowing and reaping-machines of ingenious construction were also introduced, many of which not only cut down the grain, but also bind it up into sheaves. At the start of the twentieth century steam was extensively used as a motive power in thrashing, in chaff-cutting, turnip-slicing, and even in churning. Only to be replaced after the invention of the combustion engine with petrol-power. Mechanisation led to the enlargement of fields, with small fields being amalgamated by the destruction of separating hedgerows to enable mechanical tractors and other farm vehicles to operate efficiently. The effect upon wildlife in Britain was devastating, and public concern started to grow.
The Second World War revolutionized agriculture in Britain, and led to the development of intensive farming techniques known as 'factory farming' and new anonymous breeds of livestock being developed which mature very quickly. During the later half of the twentieth century the public in Britain rebelled against the inhumanity of intensive animal husbandry, typified by 'battery hens' in which thousands of hens are kept in individual tiny cages within massive warehouses, unable to stretch let alone move around, and free-range or more traditional animal husbandry started to reappear in commercial agriculture.
The twentieth century also saw the wide scale introduction of chemical fertilizers and insecticides, many of which were harmful to the consumers and from a public backlash emerged a return to traditional farming, known as organic farming. Research Agriculture
Bath is the immersion of the body in water, or an apparatus for this purpose. The use of the bath as an institution apart from occasional immersion in rivers or the sea, is, as might be anticipated, an exceedingly old custom. Homer mentions the bath as one of the first refreshments offered to a guest; thus, when Ulysses enters the palace of Circe, a bath is prepared for him, and he is anointed after it with costly perfumes. No representation, however, of a bath as we understand it is given upon the Greek vases, bathers being represented either simply washing at an elevated basin, or having water poured over them from above. In later times, rooms, both public and private, were built expressly for bathing, the public baths of the Greeks being mostly connected with the gymnasia. Apparently, by an inversion of the later practice, it was customary in the Homeric epoch to take first a cold and then a hot bath; but the Lacedemonians substituted the hot-air sudorific bath, as less enervating than warm water, and in Athens at the time of Demosthenes and Socrates the warm bath was considered by the more rigorous as an effeminate custom.
The fullest details we have with respect to the bathing of the ancients apply to its luxurious development under the Romans. Their bathing establishments consisted of four main sections: the undressing room, with an adjoining chamber in which the bathers were anointed; a cold room with provision for a cold bath; a room heated moderately to serve as a preparation for the highest and lowest temperatures; and the sweating-room, at one extremity of which was a vapour-bath and at the other an ordinary hot bath. After going through the entire course both the Greeks and Romans made use of strigils or scrapers, either of horn or metal, to remove perspiration, oil, and impurities from the skin. Connected with the bath were walks, covered race-grounds, tennis-courts, and gardens, the whole, both in the external and internal decorations, being frequently on a palatial scale. The group of the Laocoon and the Parnese Hercules were both found in the ruins of Roman baths.
With respect to modern baths, that commonly in use in Russia consists of a single hall, built of wood, in the midst of which is a powerful metal oven, covered with heated stones, and surrounded with broad benches, on which the bathers take their places. Cold water is then poured upon the heated stones, and a thick, hot steam rises, which causes the sweat to issue from the whole body. The bather is then gently whipped with wet birch rods, rubbed with soap, and washed with lukewarm and cold water; of the latter, some pailfuls are poured over his head; or else he leaps, immediately after this sweating-bath, into a river or pond, or rolls in the snow.
The Turks, by their religion, are obliged to make repeated ablutions daily, and for this purpose there is, in every city, a public bath connected with a mosque. A favourite bath among them, however, is a modification of the hot-air sudorific-bath of the ancients introduced under the name of Turkish Bath into other than Islamic countries. A regular accompaniment of this bath, when properly given, is the operation known as 'kneading,' or massage, generally performed at the close of the sweating process, after the final rubbing of the bather with soap, and consisting in a systematic pressing and squeezing of the whole body, stretching the limbs, and manipulating all the joints as well as the fleshy and muscular parts.
Public baths were common in Europe during the late 19th century, but the first English public baths and wash-houses of the kind common in all cities during the late 19th century were established in Liverpool and near the London docks in 1844. In 1846 an act was passed for their encouragement, and a Baths and Wash-houses Act of 1878 authorized the establishment of cheap swimming-baths.
The principal natural warm baths in England are at Bath in Somersetshire (the hottest), and Brixton and Matlock in Derbyshire. The temperature of the Bath springs ranges from 109 to 117 degrees, while that of the Buxton and Matlockwaters scarcely exceeds 82 degrees. The baths of Harrogate, which are strongly impregnated with sulphuretted hydrogen gas, are also of great repute for the cure of obstinate cutaneous diseases, indurations of the glands, etc. The most celebrated natural hot baths in Europe are those of Aix-la-Chapelle, and the various Baden in Germany; Toeplitz, in Bohemia; Bagnieres, Bareges, and Dax, in the south of France; and Spa, in Belgium. Besides the various kinds of water-bath with or without medication or natural mineral ingredients, there are also milk, oil, wine, earth, sand, mud, and electric baths, smoke-baths and gas-baths; but these are as a rule only indulged after specific prescription.
The practice of bathing as a method of cure in cases of disease falls under the head of hydrotherapathy; in the 19th century it was advised that even when bathing was employed simply for pleasure or purification due regard should be paid to the physiological condition of the bather. During the Victorian era in Britain writers were concerned about the potential dangers of bathing, and one warned:
'in many cases cold bathing should be avoided altogether, especially by those who have any tendency to spitting of blood or consumption, by gouty people, or by those who have any latent visceral disease or apoplectic tendency. Wherever the bath is followed by shivering instead of by a healthy reactionary glow, it is undesirable; and a cold bath in the morning after any debauchery or excess in eating or drinking on the previous evening is exceedingly imprudent. Delicate persons and children ought not to bathe in the sea before ten or eleven o'clock in the morning, and in no case should bathing be indulged after a long fast. In cold streams and rivers additional precautions should be taken, the cold plunge, when heated or fatigued, being frequently attended with fatal results. Even warm baths are not wholly free from danger; apoplexy and death having been known to follow a hot bath when entered with a full stomach. As a rule the temperature should not exceed 105 degrees, and they should not be too long continued. Frequent indulgence in them has an enervating effect, though the majority of people need as yet no renewal of Hadrian's prohibitive legislation in this matter.'
The eminent author, George Black, in 1892, while generally encouraging bathing, and describing bathing as 'likely to be of excellent use and efficacy both in the prevention and cure of disease.' Also went on to warn:
'Baths should never be taken immediately after a meal, nor when the body is very much exhausted by fatigue or excitement of any kind, nor during nor just before menstruation; and they should be sparingly and guardedly used by pregnant women.' Research Bath
The British Empire League was an association formed in 1895 in London for the purpose of promoting trade between the United Kingdom, the colonies and India; fostering closer intercourse between the different portions of the empire by the establishment of cheaper and more direct steam postal and telegraphic communication; devising a more perfect co-operation of the military and naval forces of the empire, with a special view to the due protection of the trade routes; assimilating, as far as possible, the laws relating to copyright, patents, legitimacy, and bankruptcy throughout the empire; the calling of periodic conferences to deal with these and similar questions on the lines of the London Conference of 1887 and the OttawaConference of 1894. Research British Empire League
Calico-printing is the art of applying colours to cloth after it has come from the hand of the weaver in such a manner as to form patterns or figures. The art was originally brought to Britain from India, and was sometimes practised on linen, woollen, and silk, but most frequently upon that species of cotton cloth called calico. The process was originally accomplished by means of hand-blocks made of wood on which patterns or parts of patterns for each different colour were cut. These blocks were of various dimensions, according to the nature of the work, and where several colours were employed in one pattern, a block for each colour was necessary.
As an improvement in the method of printing from wooden blocks, especially where delicacy of outline was required, engraved copperplates were introduced about 1760; but the greatest improvement was effected by the introduction of cylinder printing about 1785, which had almost superseded the other methods, except for particular styles by 1900. The machinery then generally used consisted of various modifications of the cylinder printing-machine, in which a number of separate engraved cylinders were mounted, corresponding to the number of colours to be printed. Formerly the cloth had to pass once through the machine for every colour; but later, by an arrangement of machinery equally ingenious and effective, any number of cylinders were fitted on one machine, which acted on the cloth one after the other, and by this means the pattern was finished with a corresponding number of colours in the same time that was formerly employed to give one.
A great variety of methods have been employed in calico-printing, but they all fall under the general heads of dye-colours and steam-colours. Under the first head are included all the styles in which the pattern is printed on the cloth by a mordant - a substance which may have little or no colour itself, but has an affinity for the fibre on the one hand, and for the colouring matter on the other - the dye or colouring matter being subsequently fixed by dyeing on such parts of the cloth as have been impregnated with the mordant, and thus bringing out the pattern.
In steam-colour printing the colouring material is applied to the cloth direct from the printing-cylinder, and subsequently fixed by steaming. In steam-colours there is no limit to the number and variety of shades which may be produced, each colour-box on the cylinder printing-machine containing the whole ingredients essential to the production and fixation of a separate and distinct shade of colour. This process was superseding most of the other styles by the end of the Victorian era, the brilliant coal-tar colours so extensively used being almost entirely fixed by steaming.
The bodies used for fixing were tin mordants, tannic acid, etc, which were mixed with the dye-colours and printed together. The effects of calico-printing are varied by numerous other operations, such as the discharge-style, in which the cloth is first dyed all over, then printed in a certain pattern with discharge-chemicals, which either produce a pattern of some other colour, or one purely white, as in the Turkey-red bandanna handkerchiefs. The resist-style, in some respects, is the reverse of the discharge-style; the process being to print a pattern in certain chemicals, which will enable those parts to resist the action of the dye subsequently applied to all other parts of the cloth. After the prints have undergone the printing process they are submitted to a series of finishing operations, the object of which is to give to the fabrics a pleasing appearance to the eye. Research Calico-Printing
Dredging is a term applied to the operation of removing mud, silt, and other deposits from the bottom of harbours, canals, rivers, docks, etc. The most simple dredging apparatus is the spoon apparatus, which consists of a strong iron ring or hoop, properly formed for making an impression upon the soft matter at the bottom, so as to scoop it into a large bag attached to the ring and perforated with a number of small holes. The means for working it is a long handle, a suspending rope, and a crane or sweep-pole planted in a boat.
Much more effective was the steam dredging-machine that became common during the 19th century. It had a succession of strong iron buckets on an endless chain, which traversed on a frame whose lower end was vertically adjustable so as to regulate the depth at which it worked. It was worked by steam, and the buckets tore up the matter at the bottom, raised it, and discharge it into punts or hoppers close to the dredging vessel. Various forms of steam - pump dredgers, in which suction-pipes were the chief features, were also used.
The river Clyde, from being a shallow stream, was converted, mainly by dredging, into a waterway carrying large vessels up to Glasgow.
Dredging rivers for gold has been largely carried on since the 19th century; and the gold-dredge may even be floated in water artificially supplied.
Dredging is also the operation of dragging the bottom of the sea for molluscs, plants, and other objects, it may be for scientific observation. The oyster-dredge is a light iron frame with a scraper like a narrow hoe on one side, and a bag attached to receive the oysters. The dredges used by naturalists are mostly modifications of or somewhat similar to the oyster-dredge. Scientific dredging assumed a high importance at the end of the 19th century for research into the life of deep-sea areas, before the invention of deep-sea diving equipment and cameras. Research Dredging
Factory Acts are acts passed for the regulation of factories and similar establishments. In the 18th and 19th century it was considered that women and children were not qualified fully to protect themselves against the strain of competition, and asa result the British legislature passed a series of acts to regulate the conditions of their employment in factories.
The immediate occasion of the first act passed to regulate factory employment in England was the outbreak of an epidemic disease which committed great havoc among the younger persons employed in factories in the district round Manchester at the beginning of the 19th century.
An act was passed in 1802, The Health and Morals of Apprentices Act, in which provision was made for the regular cleansing and ventilation of mills and factories, and also for limiting the hours of work to twelve daily and forbade night work for children, and made provisions for their proper accommodation.
In 1819 an act followed after Robert Owen, an important factory-owner in Scotland, demonstrated that it was possible to improve factory conditions and make profits at the same time, and later campaigned for State reform. This Act prescribed an hour and a half for meals in the course of a working day, and prohibited children under nine years of age being employed in factorywork at all.
Early Factory Acts were not enforced, and as such were impotent. In 1833 the first truly effective Factory Act was passed. This act applied to all textile factories, and stated that no child under the age of nine was to work in a mill; children under the age of 13 were restricted to working no more than nine hours in a day and children between the ages of 13 and 18 were restricted to working no more than 12 hours in a day. The vital feature of this Act was that it was successfully enforced by full-time inspectors, whose job was to see that it was obeyed in the factories.
Various acts were passed up to 1878, when a general factory and Workshop Act was passed, consolidating the previous series of statutes. Another general act was passed in 1901 and since then numerous regulations and acts have been introduced.
The original acts contained general provisions regarding drainage, sanitary conveniences, overcrowding, ventilation, fencing of dangerous machinery, etc. Addressing what we would now term health and safety.
Factories are distinguished from workshops as making use of, originally, steam or other mechanical power. In the 19th century British textile factories the hours of labour for women and young persons (the latter between 14 and 18 years of age) were restricted to 10, but only 6.5 on Saturday and 56 in the week. In 19th century British non-textile factories and workshops the hours permitted were 10.5 per day and 60 per week at most. Children (of 11 to 14 years) were still employed, but not allowed to be employed more than 6.5 hours on any one day. Provision was made for a certain number of annual holidays. Special provisions for particular kinds of factories were made by separate acts, and under these the employment of females and young persons was regulated in bleaching and dyeing works, lace-factories, manufactories of earthenware, Lucifer matches, percussion caps, cartridges, blast-furnaces, copper-mills, forges, foundries, manufactories of machinery, metal, India-rubber, gutta-percha, paper, glass, tobacco, letterpress printing, bookbinding, etc. The factory act of 1895 included laundries. Certain exceptions in regard to working overtime were provided for; thus women could sometimes work 14 hours a day. Before the start of the 20th century there was no direct interference in any of the factory acts with the labour of adult male persons but it was recognised that indirectly the position of the male-labourer was also affected by legislation of this sort, causing some consternation among the factory owners.
The factory acts were among the first employment laws formalised to protect workers, and while they originally sought to protect primarily women and children, during the 20th century they evolved into more general employment laws offering regulation and some protection to all employees, with the employment of children being stopped all together and later men being treated equally with women, an employee being considered a person irrespective of sex. Research Factory Acts
In geography, a geyser (from the Icelandic geysir which in turn deribes from heysa meaning to gush or rush forth) is a term applied to natural springs of hot water of the kind that were first observed in Iceland. The geysers of Iceland, about a hundred in number, lie about 30 miles north west of Mount Hecia, in a plain covered by hot-springs and steaming apertures. The two most remarkable are the Great Geyser and the New Geyser or Strokkur (churn), the former of which throws up at times a column of hot water to the height of from 80 to 200 feet. The basin of the Great Geyser is about 70 feet across at its greatest diameter. The New Geyser, which is only 100 meters away, is much smaller in size. The springs are supposed to be connected with Mount Hecia, and the phenomenon of eruption has been explained by Tyndall as due to the heating of the walls of a fissure, whereby the water is slowly raised to the boiling point under pressure, and explodes into steam, an interval being required for the process to be repeated. The geysers of Iceland, however, were surpassed by those discovered in the Rocky Mountains in the Yellowstone Region of Wyoming Territory, the largest of which throw up jets of water from 90 to 250 feet high. The hot-lake district of Auckland, New Zealand, is also famous in possessing some of the most remarkable geyser scenery in the world. These phenomena are of three kinds: the puias (fire-springs), geysers continually or intermittently active; ngawhas or inactive puias, which emitsteam, but do not throw up columns of water; and waiariki or hot-water cisterns. This region is remarkable for the number of natural terraces containing hot-water pools or cisterns, and its lakes all filled at intervals by the boiling geysers and thermal springs, but the configuration of the country was considerably altered by the disastrous volcanic outbreak of 1886. Ngahapu or Ohopia, a circular rocky basin, 40 feet in diameter, in which a violent geyser is constantly ng up to the height of 10 or 12 feet, emitting dense clouds of steam, is one of the natural wonders of the southern hemisphere. Research Geyser
Grinding is a mechanical process in which certain effects are produced by attrition. This process prevails in various mechanical arts, as in grinding corn, etc, the object of which is to reduce the materials to a fine powder; or in grinding metals for the purpose of giving them a certain figure, polish, or edge. In the first case the grinding or crushing is effected by rough stones, or, as in crushing ores, between heavy metal cylinders, or by a heavy stone or iron cylinder revolving upon a smooth plate. The grinding of cutlery is effected by means of the grindstone; emery powder grinds glass lenses and specula. Ornamental glass is ground into facets by stones and lap-wheels. Diamonds and other precious stones are ground with diamond dust.
What is called dry grinding is the grinding of steel with dry grindstones. The points of needles are produced by this means, also the finishing of steel pens. Sand-jet grinding is a process in which abrasion is effected by the percussion of small hard particles on a plain surface, sharp siliceous sand being impelled by a blast artificially produced of steam or of air. By the use of flexible jointed connecting tubes the jet can be turned in any direction. Research Grinding
The Leamington stove was a form of kitchener or kitchen range exhibited at the Great Exhibition of 1851 where it won a first-class prize medal and was again exhibited in an improved version at the Dublin Exhibition of 1853. The Leamington Stove was a single fire stove with a hot plate large enough for several vessels to stand upon and be kept boiling; a very well ventilated and spacious wrought iron roaster with movable shelves, draw-out stand, double dripping-pan and meat-stand. The roaster could be converted into an oven by closing the valves, allowing bread and pastry to be baked. The Leamington Stove also had a large iron boiler with brass tap and steampipe, round and square gridirons for cooking chops and steaks, ashpan, open fire for roasting and a set of ornamental covings with plate-warmer attached. Research Leamington Stove
The first patent for a 'horseless carriage' was taken out by Ramsay and Wildgoose in 1619, but the first man to successfully make a vehicle run along a road was the Frenchman Cugnot in 1770 when his carriage carried two people at 2 mph. In 1884 Gottlieb Daimler patented an engine based upon combustion on the Otto principle, revolutionary the motor vehicle industry which had previously been based upon steam engines. Research Motor Car
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Agriculture
