Acts of the Apostles is one of the books of the New Testament. It was written in Greek by St Luke, probably in 63 or 64. It embraces a period of about thirty years, beginning immediately after the resurrection, and extending to the second year of the imprisonment of St Paul in Rome. Very little information is given regarding any of the apostles, excepting St Peter and St Paul, and the accounts of them are far from being complete.
It describes the gathering of the infantchurch; the fulfilment of the promise of Christ to his apostles in the descent of the Holy Ghost; the choice of Matthias in the place of Judas, the betrayer; the testimony of the apostles to the resurrection of Jesus in their discourses; their preaching in Jerusalem and in Judea, and afterwards to the Gentiles; the conversion of Paul, his preaching in Asia Minor, Greece, and Italy, his miracles and labours. Research Acts of the Apostles
Ballooning is a form of un-powered flight dependant on the inflation of a usually spherical fabric container with a gas that is lighter than air, such as heated air. The container (balloon) rises, carrying the pilot and passengers in a basket beneath it. Descent is effected by the controlled release of the gas, through a valve in the top of the container, operated by a cord from the basket. Research Ballooning
In mathematics, a brachistochrone is the curve between two points through which a body moves under the force of gravity in a shorter time than for any other curve, that is the path of quickest descent. Research Brachistochrone
A collective noun (or collective name) is a name which denotes or represents a number of individual items. For example, a number of sheep together is known as a 'flock'. The word 'flock' is the collective noun for a number of sheep. Some items have multiple collective nouns, for example a collection of goats can be known as a 'herd', a 'tribe' or a 'trip'.
Ambush is the collective noun for a group of tigers.
Army is the collective noun for a group of frogs, ants,
Array is the collective noun for a group of hedgehogs.
Badelynge is the collective noun for a group of ducks on the ground.
Bale is the collective noun for a group of turtles.
Barren is the collective noun for a group of mules.
Basket is the collective noun for a group of plums.
Battery is the collective noun for a group of barracuda.
Bazaar is the collective noun for a group of guillemots.
Bed is the collective noun for a group of clams.
Bench is the collective noun for a group of bishops, magistrates.
Bevy is the collective noun for a group of quail, roes, swans, pheasants, ladies.
Brace is the collective noun for a group of bucks.
Brood is the collective noun for a group of chickens.
Building is the collective noun for a group of rooks.
Bunch is the collective noun for a group of grapes, flowers.
Bundle is the collective noun for a group of asparagus.
Business is the collective noun for a group of ferrets.
Caravan is the collective noun for a group of camels.
Cast is the collective noun for a group of hawks, falcons.
Cete is the collective noun for a group of badgers.
Charm is the collective noun for a group of goldfinches.
Chatter is the collective noun for a group of budgerigars.
Chattering is the collective noun for a group of choughs.
Chine is the collective noun for a group of polecats.
Clamour is the collective noun for a group of rooks.
Clous is the collective noun for a group of gnats.
Clowder is the collective noun for a group of cats.
Clump is the collective noun for a group of trees.
Cluster is the collective noun for a group of grapes, spiders.
Clutch is the collective noun for a group of eggs.
Clutter is the collective noun for a group of spiders.
Colony is the collective noun for a group of gulls, frogs, penguins, ants, beavers.
Company is the collective noun for a group of widgeon, parrots.
Congregation is the collective noun for a group of plovers.
Convocation is the collective noun for a group of eagles.
Covert is the collective noun for a group of coots.
Covey is the collective noun for a group of partridges, grouse.
Crash is the collective noun for a group of rhinoceros.
Consanguinity is the relation of persons descended from the same ancestor. It is either lineal or collateral - lineal between father and son, grandfather and grandson, and all persons in the direct line of ancestry and descent, from one another; collateral between brothers, cousins, and other kinsmen descended from a common ancestor, but not from one another. Research Consanguinity
The Feudal System is that system by which land (known as a, fief) is held by a vassal on condition of fidelity, that is, in consideration of services to be rendered to his superior or feudal lord. The nature of the feudal system is to be explained by its origin amongst the Germanic tribes.
In the earliest times the relation of superior and vassal did not exist in connection with the ownership of land. Each freeman had his share of the tribe lands, which were held simply on condition of his fulfilling his public duties of attendance at the councils of the mark or township and performing his share of military service in the wars or musters decreed at such councils. The noble had, of course, more land and more influence than the simple freeman, but there need be no tie of vassalage between them. This seems to have been the primitive social organization of the Anglo-Saxons and other German tribes. The lands held by all freemen, whether noble or ordinary freemen, under this system, are said to be allodial, as distinguished from feudal lands, which imply service to a superior lord.
By the close of the 10th century, however, this system had undergone considerable modifications. The masses of Teutonic invaders who overran Gaul and England had necessarily to confer exceptional powers on their leaders; and as they were for long very much in the position of military in an enemy's country, these powers were naturally continued. Thus it was that kings, before unknown to the Anglo-Saxons, make their appearance immediately after their descent upon Britain. It was common for a chief or great man to have a retinue or body-guard composed of valiant youths, who were furnished by the chief with arms and provisions, and who in return devoted themselves to his service. These companions (Anglo-Saxon, Gesithas; German, Gesellen) originally received no pay except their arms, horses, and provisions, and the portion of the spoils which remained after the chieftain had taken his own share. But when conquered lands came to be apportioned and large districts fell into the hands of kings or dukes and their subordinates, they gave certain portions of the territory to their attendants to enjoy for life. These estates were called beneficia or fiefs, because they were only lent to their possessors, to revert after their death to the grantor, who immediately gave them to another of his servants on the same terms.
As the son commonly esteemed it his duty, or was forced by necessity, to devote his arm to the lord in whose service his father had lived, he also received his father's fief; or rather, he was invested with it anew. By the usage of centuries this custom became a right and the fief became hereditary. A fief rendered vacant by the death of the holder was at once taken possession of by his son, on the sole condition of paying homage to the feudal superior. Thus a feudal nobility and a feudal system arose and for a time existed alongside of the old allodial system. But gradually the greater security to be got by putting one's self under the protection of some powerful ruler or leader gave the feudal system the predominance. The free proprietor of landed property, oppressed by powerful neighbours, sought refuge in submitting to some more powerful nobleman, to whom he surrendered his land, receiving it back as a vassal.
Even the inferior nobility found it to be to their advantage to have themselves recognized as feudatories of the nearest duke or earl; and as the royal power steadily advanced, the offices of duke, ealdorman, gerefa, etc., were always bestowed by the king. Thus the crown became the source of all authority and possession in the country. The land which had once been 'folcland,' or the land of the people, became the land of the king, from whom all titles to it were held to be derived. Such at least was the development of feudalism in England, where its centralizing tendencies, especially in the matter of holding land from the crown, were strongly reinforced by the circumstances of the conquest under William The Conqueror. Under him and his immediate successors there was a struggle between royalty and the nobility, which ended in the power of the latter sinking before that of the kings.
On the other hand, in Germany, France, and elsewhere on the Continent, the disintegrating tendencies of feudalism as a system of government had full play. In these countries the weakening of the kingly authority encouraged the great feudal dukes and counts to set up in an almost absolute independence, which in France was afterwards gradually lost as the monarchy grew stronger, but in Germany continued to divide the land down almost to modern times into a number of petty principalities.
Among the chief agencies that overthrew the feudal system were the rise of cities, the change in modes of warfare, and the spread of knowledge and civilization. The spirit of the feudal system, grounded on the prevalence of landed property, was necessarily foreign to cities which owed their origin to industry and personal property, and founded thereon a new sort of power. The growth of this new class, with its wealth and industrial importance, has contributed more than anything else to a social and political development before which the old feudal relations of society have almost totally disappeared. Even yet, however, the laws relating to land still bear the stamp of feudalism in various countries. Research Feudal
Genealogy is the account or history of the descent of a person or of a family from an ancestor or ancestors in the natural order of succession. Persons descended from a common father constitute a family. Under the idea of degree of relationship is denoted the nearness or remoteness of relationship in which one person stands with respect to another. A series of several persons, descended from a common progenitor, is called a line. A line is either direct or collateral. The collateral lines comprehend the several lines which unite in a common progenitor. For illustrating descent and relationship genealogical tables are constructed, the order of which depends on the end in view. The common form of genealogical tables places the common stock at the head, and shows the degree of each descendant by lines. Some tables, however, have been constructed in the form of a tree, in which the progenitor is placed beneath, as if for a root. Research Genealogy
Glaciers are icy masses of great bulk, harder than snow, yet not exactly like common ice, which cover the summits and sides of mountains above the snow-line. They are found in Switzerland, Scandinavia, the Andes, etc.
They extend down into the valleys often far below the snow-line, and bear a considerable resemblance to a frozen torrent. They take their origin in the higher valleys, where they are formed by the congelation and compression of masses of snow in that condition called by French writers neve, by German authors, firn.
The ice of glaciers differs from that produced by the freezing of still water, and is composed of thin layers filled with air-bubbles. It is likewise more brittle and less transparent. The glaciers are continually moving downwards, and not unfrequently reach the borders of cultivation. The rate at which a glacier moves generally varies from 45 to 60 cm in twenty-four hours.
At its lower end it is generally very steep and inaccessible. In its middle course it resembles a frozen stream
with an undulating surface, broken up by fissures or crevasses. As it descends it experiences a gradualdiminution from the action of the sun and rain, and from the heat of the earth. Hence a phenomenon universally attendant on glaciers - the issue of a stream of ice-cold turbid water from their lower extremity. The descent of glaciers is shown by changes in the position of masses of rock at their sides and on their surface. A remarkable glacier phenomenon is that of moraines, as they are called, consisting of accumulations of stones and detritus piled up on the sides of the glacier, or scattered along the surface. They are composed of fragments of rock detached by the action of frost and other causes.
The fissures or crevasses by which glaciers are traversed are sometimes more than 30 meters in depth, and from being often covered with snow are exceedingly dangerous to travellers. One of the most famous glaciers of the Alps is the Mer de Glace, belonging to Mont Blanc, in the valley of Chamouni, about 1740 meters above sea level. It is more especially, however, in the chain of Monte Rosa that the phenomena of glaciers are exhibited in their greatest sublimity, as also in their most interesting phases from a scientific point of view.
Glaciers exist in all zones in which mountains rise above the snow-line. Those of Norway are well known, and they abound in Iceland and Spitzbergen. Hooker and other travellers gave accounts of those of the Himalaya. They are conspicuous on the Andes, while the Southern Alps of New Zealandrival in this respect the Alpine regions of Switzerland.
The problem of the descent of the glaciers is of extraordinary interest, and various theories have been put forward to account for it. It was shown by Professor Forbes, of Edinburgh, that a glacier moves very much like a river; the middle and upper parts faster than the sides and the bottom; and he showed that glacier motion was analogous to the way in which a mass of thick mortar or a quantity of pitch flows down in an inclined trough. His theory is known as the viscous theory of glaciers, which presupposes that ice is a plastic body, and this plasticity has been satisfactorily explained by Professor James Thomson of Glasgow by the phenomenon of the melting and refreezing of ice.
Water, he discovered, when subjected to pressure, freezes at a lower temperature than when the pressure is removed. Consequently when ice is subjected to pressure it melts; if it is relieved of pressure the water again solidifies. Therefore if two pieces of ice are pressed together, they tend to relieve themselves by melting at their points of contact, and the water thus produced immediately solidifies on its escape. If ice is strained in any way it similarly relieves itself at the strained parts, and a similar regelation follows. This, when applied to the glaciers, gives a complete explanation of their plasticity. Pressed downwards by the vast superincumbent mass, the ice gradually yields. Melting and re-freezing takes place at some parts, at others the gradual yielding at strained points goes on. In the latter process there is no visible melting, but there is the gradual yielding from point to point to the pressure above, and there is the transference relatively to each other of the molecules that constitute the, at first sight, solid mass. If, however, at certain points the strain is intense, the ice becomes extremely brittle. The latter fact disposes of Tyndall's objection to Forbes' theory, which was based on the fact that crevasses proved the brittleness, and not the viscosity of ice. Research Glacier
The Gulf Stream is a well-known oceanic current, so called because it issues from the Gulf of Mexico. It owes its origin to the fact that the westward moving waters of the tropical portion of the Atlantic Ocean, encountering the eastward projection of South America, become divided into two currents, one setting southwards along the Brazilian coast, and the other northward past the mouths of the Amazon and Orinoco, into the Caribbean Sea. It then enters the Gulf of Mexico, and thence emerges through the Channel of Florida as the Gulf Stream. Its course is next to the north and eastwards, in a direction parallel to the coast of the United States, past Cape Hatteras, along the southern edge of the 'great banks' of Nantucket and Newfoundland (between the meridians of 48 and 60 degrees west), after which its course as a distinct current is less obvious.
In the earlier part of its course, especially when rounding the extremity of Florida, the Gulf Stream forms a well-defined current, distinguished by its high temperature and its deep blue or indigo colour. On account of the descent of the Polar or Baffin Bay current along the coast in a direction opposite to that of the Gulf Stream, the water on its inland side is colder than that to the eastward of it. The difference of temperature between the Gulf Stream and this cold current sometimes amounts to 20 or even 30 degrees Fahrenheit
The velocity of the Gulf Stream varies with its course. Within the Florida Channel it attains a mean of 65 miles per day, this sinks to 56 miles off Charleston, becomes 36 miles to 46 off Nautucket, and 28 miles to the south of the Newfoundland Banks; 300 miles to the eastward of Newfoundland its movement is hardly perceptible. At the bottom of the Florida Channel the observed temperature is 34 degrees that of the surface from 80 to 84 degrees Fahrenheit. Research Gulf Stream
Heredity is the transmission from parent to offspring of physical and intellectual characters. This has been at all times believed in, but it was only in Victorian times that the conviction was, for the first time, in the hands of Darwin, Herbert Spencer, and Wallace, been methodized so as to embody an important zoological doctrine. The Victorian view of evolution in biology rested upon the belief that acquired peculiarities, or differences which may arise between parent and offspring, could be transmitted with some probability of permanence, especially if the variation presented by the young was determined by external conditions, or if it was such as to adapt the possessor more thoroughly to the conditions under which it is placed. On the other hand, while variations may be thus permanently transmitted by heredity, yet this very tendency of the young to repeat the characters of the parent is also a check on variability, or the tendency of structure and attributes to change with the environment. It may be noted that while the strong tendency to hereditary transmission works in the majority of cases so as to perpetuate those most fitted to survive, it secures the same result in other cases by a converse action. The descent of disease in families tends ultimately to purify the race by accumulating incapacities which end in the extinction of the enfeebled strain. The discovery of genetics in the 20th century built upon the earlier theories of heredity, and explained, to a degree, the transport of the passing on of the characteristics. Research Heredity
The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
Abbreviations
Research Acts of the Apostles
