Bog is the name given to a piece of wet, soft, and spongy ground, where the soil is composed mainly of decaying and decayed vegetable matter. Such ground is valueless for agriculture until reclaimed, but often yields abundance of peat for fuel.
A bog seems usually to be formed as follows: A shallow pool induces the formation of aquatic plants, which gradually creep in from the borders to the deeper centre. Mud accumulates round their roots and stalks, and a semi-fluid mass is formed, well suited for the growth of moss, particularly Sphagnum, which now begins to luxuriate, continually absorbing water, and shooting out new plants above as the old decay beneath; these are consequently rotted, and compressed into a solid substance, gradually replacing the water by a mass of vegetable matter. A layer of clay, frequently found over gravel, assists the formation of bog by its power of retaining moisture. When the subsoil is very retentive, and the quantity of water becomes excessive, the superincumbent peat sometimes bursts forth and floats over adjacent lands.
Bogs are generally divided into two classes: red bogs, or peat-mosses, and black bogs, or mountain mosses. The former class are found in extensive plains frequently running through several counties, such as the Chatmoss in Lancashire, and the Bog of Alien in Ireland, the depth varying from 3.6 to 13 metres. Their texture is light and full of filaments, and is formed by the slow decay of mosses and plants of different kinds. The lower parts, being more entirely decayed, approach nearer to the nature of the humus than the upper portion, and, as being more carbonaceous, are more valuable for fuel. Black bog is formed by a more rapid decomposition of plants. It is heavier and more homogeneous in quality, but is usually found in limited and detached portions, and at high elevations where its reclamation is difficult.
In Ireland bogs frequently rest on a calcareous subsoil, which is of great value in reclaiming them. In the reclamation of bog land a permanent system of drainage must be established; the loose and spongy soil must be mixed with a sufficient quantity of mineral matter to give firmness to its texture and fertilize its superabundant humus; proper manures must be provided to facilitate the extraction of nutriment from the new soil, and a rotation of crops adopted suitable for bringing it into permanent condition. The materials best adapted for reclaiming peat are calcareousearths, limestonegravel, shell-marl, and shell-sand. Thoroughly reclaimed bogs are not liable to revert to their former condition. Trunks of trees are often found in bogs as are also bones of extinct animals. Research Bog
A bog spavin is a fluctuating swelling on the inner and front part of the hock of a horse, arising from a distension of the joint capsule with synovial fluid. Research Bog Spavin
Eau de Luce ('water of Luce'), so called from the name of its inventor, is made by dissolving white soap in spirit of wine, and adding oil of amber and sal ammoniac. It is a milky fluid, antispasmodio and stimulant. Research Eau de Luce
Embalming is the process of filling and surrounding with aromatic and antiseptic substances any bodies, particularly corpses, in order to preserve them from corruption. The ancient Egyptians employed the art on a great scale, and other peoples, for example the Assyrians and Persians, followed them, but by no means equalled them in it. The ancient Peruvians appear to have injected and washed the corpses with the fluid that flows from imperfectly burned wood, which would of course contain pyroligneous acid, creosote, and other antiseptics. Pliny alludes to the use of a similar fluid by the Egyptians for embalming. In later times bodies have been preserved, a long time by embalming, especially when they have remained at a low and uniformtemperature, and have been protected from the air. The body of Edward I was buried in WestminsterAbbey in 1307, and in 1770 was found entire. Canute died in 1036; his body was found very fresh in 1776 in WinchesterCathedral. The bodies of William the Conqueror and of Matilda his wife were found entire at Caen in the 16th century. Of the various later artificial means of preserving bodies, impregnation with corrosive sublimate appears to be one of the most effective, next to immersion in spirits. An injection of sulphate of zinc into the bloodvessels is said to be very effective. Research Embalming
Gum is a substance of various properties which exudes spontaneously from the bark of certain trees, such as the plum, the peach, etc; or from incisions made in the bark to facilitate the flow. Gums form non-crystalline rounded drops or tears, the purest varieties being transparent or translucent, of a pale yellow but sometimes of a dark colour.
When dissolved in water gum forms a thick, smooth fluid, with considerable viscosity. Some gums, such as gum-arabic, dissolve in water; others, like tragacanth, are only partially soluble; they are insoluble in alcohol. By being insoluble in alcoholgums are distinguished from resins. They have no odour, and only a very faint taste. The different kinds of gum receive their names from the countries from which they are imported - such as gum-arabic, gum-senegal, Barbary gum, East India gum, etc, and from individual features, as cherry-tree gum, tragacanth, etc. Gum-resins require water and alcohol to dissolve them. Research Gum
A philtre is a love-compelling magic potion or charm. They were common in Greece and Rome and in medieval Europe and more recently in the East. They are still widely used in Africa and among races of strong African descent, for example Jamaicans, where a common form of philtre is for a woman to add her own menstrual fluid to a preparation of food or drink for her intended mate along with a spell. Fear of philtres is very great in Jamaica, Morocco and other parts of Africa. Research Philtre
Tide is a term applied to the alternate rising and falling of the sea, twice in each lunar day, to the attraction of the moon and the sun. The movement is most marked on shores which shelve gradually. The average interval between successive high tides is twelve hours and twenty-five minutes, half the time between successive passages of the moon across a given meridian. The height of the tide varies rhythmically. The highest, or spring, tides gradually change to the lowest, or neap, tides. The interval between successive spring tides is half a lunar month. Usually spring tides occur at or near the time when the moon is new or full, and neap tides when the moon is in the first or third quarter. This fact leading to an early realisation of the moon being the main cause of the tide.
The mass of the moon attracts the oceanic waters, which, being fluid, make a little peak pointing directly from the earth's centre to the centre of the moon; this peak is held on the line of centres while the earth rotates beneath it. To observers on the earth the peak of water appears to move. At the antipodes of this peak, on the side of the earth remote from the moon, a second peak occurs, because the distant water is again attracted to the line of centers. These peaks are the successive high tides.
The lunar attraction is coupled with a similar attraction due to the sun, but only of about just under one half the magnitude. When the line of centers of the earth and the moon approximates to the line of centers of the earth and the sun, i.e. at full and new moon, the combined solar and lunar tides produce the spring tides. When the two lines of centers are at right angles, at the first and third quarters, the solar attraction reduces the lunar effect, and produces the neap tides. The neap tides are, on average, 5:13 of the spring tides.
The above explanation of the outstanding tidal features merely explains the phenomena as they would occur upon an earth with a uniform film of water and without land mass. The interposition of the great land masses, and the differences in the oceanic depths, causes variations in the tides along the coasts. Research Tide
In its narrow, everyday use, vegetable is a word indicating any herb that is cultivated specially for table use in whole or part, such as the turnip (root), cabbage (leaves), broccoli (flowers), peas and beans (fruit). In its widest sense it includes all living things that are not animals - trees, shrubs, herbs, ferns, mosses, seaweeds, fungi, and the microscopic diatoms.
The unit of structure, the cell, is essentially the same in both animals and plants, but the combination of the cells into tissues and organs shows marked differences.
All animals depend for their food upon material originally elaborated by plants. The green plants alone have the power to construct this basic food material from elemental substances, and physiological processes different from those of animal assimilation are rendered necessary. The fungi approach the animals in this respect: they must feed upon material that has already done service as part of the structure of other plants or of animals.
The fine divisions of roots explore the soil in search of water in which are dissolved the salts of sodium, iron, potassium, phosphorus, calcium, sulphur, etc. The hairs with which the rootlets are clothed absorb this fluid by osmosis, and it is passed upward through the long vessels of the wood bundles until it reaches the cells of the leaf. These cells contain green bodies (chloroplasts) in their protoplasm, and it is these that impart the green colour to leaves and soft shoots. In the leaf-skin (epidermis) there are innumerable pores or stomata through which surplus water from the roots is evaporated and through which atmospheric air is admitted to the spaces between the leaf-cells.
The chloroplasts in these cells have the power to utilise solar energy in decomposing the carbon dioxide of the air, and the cells retain the carbon, setting free the oxygen. Water from the roots is broken up also into its elements, hydrogen and oxygen, and with these plus carbonstarch is formed. This, converted into grape sugar, is passed from cell to cell to parts of the plant whore it is needed for the production of new cells, wood, bark, leaves, or fruit. Starch is the material from which are made all the organic substances produced by the plant.
The surplus over present requirements is stored up as reserves in seeds, enlarged roots or stems, bulbs, or tubers for renewed growth or floral display at a later season. Waste products are converted into resins, oils/wax, or alkaloids - many of these being of considerable economic value to man. Part of the water stream from the roots passes by osmosis from cell to cell, where it is necessary in order to keep the protoplasm in an active condition; any insufficiency is followed by a flagging of the tissues, the drooping of leaves and young shoots. In addition to the absorption of carbon by the protoplasts for building purposes, the leaf-cells also take up oxygen from the atmosphere and give off carbon much as animals do.
As the plant respires without lungs and assimilates without digestive organs, so also it can effect movements without a muscular system and react to external stimuli without a nervous system. It is sensitive to light and heat; many plants have distinct night and day positions for their leaves. It responds positively and negatively to the force of gravity, the root going down into the earth and the stem rising into the air. The growing tip of a stem or shoot commonly nutates, i.e. moves from side to side or in a circle or ellipse. The plant can orientate itself, i.e. take up a definite position in regard to the incidence of light or other external stimulus. These movements appear to be controlled largely by alterations in the position of the mobile chloroplasts.
The reproductive process is, in essentials, similar to that of animals, the ovules or seed-eggs in the ovary requiring to be fertilised by male sperms represented by the pollen grains produced in the anthers. The result of such fertilisation is to cause the ovule to develop into an embryo capable of further development under suitable conditions into a plant resembling the parent. Research Vegetable
The aardwolf (Proteles cristatus) is an African carnivorous mammal of the family Hyaenidae. The aardwolf, whose name in Afrikaans means 'earth wolf', resembles a small striped hyena. It is yellowish with vertical black stripes and a bushy, black-tipped tail, and it bears a long, coarse mane of erectile hairs along the length of its back. The aardwolf lives on the open, grassy plains of southern and eastern Africa. The aardwolf feeds largely on termites, particularly on the species Trinervitermes trinervoides. It is nocturnal, lives in a burrow, and is usually solitary but may forage in small packs. The litter generally consists of three or four young. The aardwolf is harmless and shy; when attacked, by dogs for example, it emits a musky-smelling fluid and may fight. Research Aardwolf
Ant is the popular name for hymenopterous (or membranous-winged) insects of various genera of the super-family Formicoidea. Ants are found in most temperate and tropical regions. They are small but powerful insects, and have long been noted for their remarkable intelligence and interesting habits. They live in communities regulated by definite laws, each member of the society bearing a well-defined and separate part in the work of the colony. Each community consists of males; of females much larger than the males; and of barren females, otherwise called neuters, workers, or nurses. The neuters are wingless, and the males and females only acquire wings for their Nuptial flight, after which the males perish, and the few females which escape the pursuit of their numerous enemies divest themselves of their wings, and either return to established nests, or become the foundresses of new colonies. The neuters perform all the labours of the ant-hill or abode of the community; they excavate the galleries, procure food, and feed the larvae or young ants, which are destitute of organs of motion. In fine weather they carefully convey them to the surface for the benefit of the sun's heat, and as attentively carry them to a place of safety either when bad weather is threatened or the ant-hill is disturbed. In like manner they watch over the safety of the nymphs or pupae about to acquire their perfect growth. Some communities possess a special type of neuters, known as 'soldiers,' from the duties that specially fall upon them, and from their powerful biting jaws.
There is a very considerable variety in the materials, size, and form of ant-hills, or nests, according to the peculiar nature or instinct of the species. Most of the British ants form nests in woods, fields, or gardens, their abodes being generally in the form of small mounds rising above the surface of the ground and containing numerous galleries and apartments. Some excavate nests in old tree-trunks. One little yellow ant (Myrmica domestica) is common in houses in Britain in some localities. Some ants live on animal food, very quickly picking quite clean the skeleton of any dead animal they may light on. Others live on saccharine matter, being very fond of the sweet substance, called honey-dew, which exudes from the bodies of Aphides, or plant-lice. These they sometimes keep in their nests, and sometimes tend on the plants where they feed; sometimes they even superintend their breeding. By stroking the aphides with their antennae they cause them to emit the sweet fluid, which the ants then greedily sip up. Various other insects are looked after by ants in a similar manner, or are found in their nests. It has been observed that some species, like the European Red Ant (Formica sanguinea), resort to violence to obtain working ants of other species for their own use, plundering the nests of suitable kinds of their larvae and pupae,which they carry off to their own nests to be carefully reared and kept as slaves. Amazon Ants (Polyergus rufescens) often keep between three and five times as many slaves as their own inhabitants in a nest.
In temperate countries male and female ants survive, at most, until autumn, or to the commencement of cool weather, though a very large proportion of them cease to exist long previous to that time. The neuters pass the winter in a state of torpor, and of course require no food. The only time when they require food is during the season of activity, when they have a vast number of young to feed. Some ants of southern Europefeed on grain, and store it up in their nests for use when required. Some species have stings as weapons, others only their powerful mandibles, or an acrid and pungent fluid (formic acid) which they can emit. The name ant is also given to the neuropterous insects otherwise called Termites.
In the 1990's a new species of ant, in appearance the same as any common garden ant, was discovered in Budapest and in 2009 the same species was found in Britain, which has a suicidal attraction to electrical fields - an attraction which overides even the desire to eat. Like American fire-ants, these ants are drawn in vast quantities to electrical switches where they die and can cause failure of the electrical system due to the numbers of ants involved, typically hundreds of thousands. In Texas, fire-ants are a major cause of traffic light failures, being drawn to the switch boxes where they die and short out the circuits. Research Ant
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Bog
