These 10 listings are so strange that each appears in only one of the 7 encyclopedias we compared. They include such classics as Voltaic Battery, Voltaic Pile, Voltameter.
a river of west Africa; which, rising in the Kong Mountains or highlands behind the Ashanti country, runs S. between Ashanti and Dahomey, and reaches the Bight of Benin through the E. part of the British Gold Coast. To left and right of its mouth it forms great lagoons, and on the bar across the mouth a heavy surf runs.
Only in Collier's New Encyclopedia
Alessandro (1745-1827), an Italian scientist. A native of Como. Professor of physics at Como and Pavia, and later in the University of Paris. In 1800 Volta described the apparatus since called the Voltaic pile. Volta has been further honored by the use of the terms, Voltaic cell and Voltaic electricity. Still more significant is the name "volt" applied to the unit of electro-motive force. The gravity cell usually seen in telegraph stations has an electro-motive force of about a volt.
Only in Aiton's Encyclopedia
a term sometimes applied to a Voltaic pile, but more specifically used for a battery of several voltaic cells; known also as a galvanic battery (from Galvani), though the honor properly belongs to Volta. See ELECTRICITY; VOLTA.
Only in Collier's New Encyclopedia
Volta's arrangement for producing a current of electricity, consisting of a pile of alternate disks of two dissimilar metals, as copper and metais, zinc, zinc and silver, zinc and platinum, separated by pieces of flannel or pasteboard moistened with salt water or with water acidulated with sulphuric acid.
Only in Collier's New Encyclopedia
in electricity, an instrument for measuring the work, and thus indirectly the strength of a voltaic current. This is done by the amount of electro-chemical decomposition, a certain current reducing a certain amount of hydrogen from water, silver or copper from their salts, etc. This must not be confounded with voltmeter.
Only in Collier's New Encyclopedia
a town of Italy, province of Pisa; 5 miles from Saline, which is 48½ miles S. E. of Leghorn. It is surrounded by ancient walls with great gates, the chief of which is the Porta all'- Arca. The cathedral, opened in 1120, contains fine marble sculptures; the baptistry of St. Giovanni and the church of St. Francesco have valuable frescoes and other paintings. The citadel, founded in 1343, with a more modern addition called Il Masteo, was long used as a penitentiary. In the Palazzo Communale is the Museo Civico, founded in 1208, and containing a valuable collection of Etruscan antiquities and a library. Volterra has also remains of baths and an amphitheater. Large alabaster works are the main industry of the town. At Saline are important salt works and borax springs. Near Volterra are also several Etruscan burying places and a th. The ancient subterranean labyrinth. Volaterræ (Etruscan V Velathræ), Volterra, was one of the 12 great Etruscan cities. The Romans took it in 474 B. C., and it became an important municipium, resisting a siege by Sulla for two years. Pop. (commune) about 17,500.
Only in Collier's New Encyclopedia
in electricity, any instrument for measuring the pressure, electromotive force, or difference of potentials at the ends of an electric current. The gold-leaf electroscope is a kind of voltmeter, but will only measure large differences of potential. If the terminals are connected with flat plates arranged parallel to each other, one of which is movable, the attractive force between the plates at a given small distance will be a voltmeter. This method is too coarse for ordinary currents, but a modification of it is employed in Thompson's quadrant electrometer. In Cardew's voltmeter the he heating effect of the current in a wire, which varies with the electromotive force, and is measured by. the expansion produced, is employed. In the majority of instruments the electro-magnetic action is employed in some form of galvanometer. These are more usually wound to act as ammeters, and if wound with very thin wire the high resistance allows the electromotive force required to drive certain current a through them to be calibrated and denoted in volts. Such instruments are adjusted or calibrated by comparison with a "standard" voltaic cell or voltameter.
Only in Collier's New Encyclopedia
a river of Italy, rising the province of Campobasso; in flows We S. E. to its junction with the Calore, and then W. past Capua into the Medi' terranean, 20 miles S. E. of Gaeta; course, about 100 miles.
Only in Collier's New Encyclopedia
the space pace occupied by a body; dimensions in length, breadth, and depth; compass, mass, bulk. In chemistry, the volume of an irregular body und from its weight and may be found and specific gravity; that is to say, the weight of a unit volume. If w be the weight of the body in grammes, and s w its specific gravity, the fraction - gives 8 Cyc 17 its volume in cubic centimeters. The capacities of vessels are determined by filling them with water or mercury from measuring tube, or other vessel whose measurin a othe capacity is previously known; or, when very great accuracy is required by determining the weight of water or mercury, at the standard temperature, which fills the vessel. In music, a term applied to the power and quality of the tone of a voice or instrument, or of a combination of sounds. In physics, the volume the of a body may be real or apparent; former is the portion of space actually occupied by the matter of which the body is composed, the latter is the sum of its real volume and the total volume of its pores. The real volume is invariable, the apparent volume can be altered in various ways; for instance, it diminishes a on solidification of the body. rule as these he cube constructed on the unit of length.
Only in Collier's New Encyclopedia
a religious and philanthropic body; organized from former members of the Salvation Army in March, 1896, by Commander and Mrs. Ballington Booth and consisting of several central societies and numerous self-supporting posts and outposts. The head officer is elected by the members as commander-in-chief, and by the directors as president. There are four branches of philanthropic work: (1) The sociological branch, which provides homes for destitute men. In 1920 the homes located in various cities furnished lodging for over 200,000 persons. (2) Homes for friendless young women. (3) The tenement work for the worthy poor. (4) The philanthropic branch, working among unprotected children. The Prison League is an important department of Volunteer activity. There are branches in most States. The homes for the reception of discharged prisoners are known as Hope Halls. A large majority of the ex-convicts who have been sheltered by these homes and provided with situations have made good records for themselves. There was an aggregate attendance of 927,045 persons at the hall meetings and 2,287,985 at the open air meetings.
Only in Collier's New Encyclopedia