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according apparatus appears approximately arrangement assumed atoms becomes bismuth calculated capacity cause cells cent centim chloride close coil compared compounds considerable considered constant containing continuous cooling copper correction corresponding curve described determined direction distance effect electrical energy equal equation error experiments expression fact field force galvanometer gases give given glass greater heat hydrogen increase induction iron lamps less light liquefied liquid lower magnetic mass matter means measured metals method molecular molecules motion nature nearly necessary observed obtained oxygen passed Phil placed plate position possible present pressure produced Prof quantity ratio referred regards represents resistance rise seen side similar solid specific surface Table taken temperature theory thermometer tube unit varies vessel vibrations volume wire
Page 171 - As a unit of resistance, the international ohm, which is based upon the ohm equal to 10" units of resistance of the CGS system of electromagnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grams in mass, of a constant cross-sectional area and of the length of 106.3 centimetres.
Page 170 - Ampere, which is one-tenth of the unit of current of the CGS system of electromagnetic units and which is represented sufficiently well for practical use by the unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with a certain specification, deposits silver at the rate of 0.001118 of a gramme per second.
Page 146 - That gravity should be innate, inherent and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of any thing else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking, can ever fall into it.
Page 227 - THE ANNALS AND MAGAZINE OF NATURAL HISTORY, INCLUDING ZOOLOGY, BOTANY, AND GEOLOGY.
Page 170 - That an unvarying current which, when passed through a solution of nitrate of silver in water, in accordance with the specification attached to this report, deposits silver at the rate of O'OOlllS of a gramme per second, may be taken as a current of one ampere...
Page 147 - ... bodies, such as the earth and moon were held to be by some of the contemporary philosophers to whom the Epicureans " would not listen." But nothing less than direct observation, proving Kepler's third law — Galileo's experiment on bodies falling from the tower of Pisa, Boyle's...
Page 103 - MacCullagh's theory of optics are in substantial agreement with all the general features of our electrical and optical knowledge. It is definitely implied in the electromotive, as distinguished from an electrodynamic, character of the electric theory of light, that the atomic charges vibrate in unison with the light-waves, quite unimpeded by any material inertia of their atoms. This hypothesis is conceivable and natural, independently of any particular explanation, on the...
Page 476 - Physical Proceedings and Abstracts. Monthly. 2s. Qd. Physical Memoirs, translated from foreign sources. Vol. I. Part I. 4s Part II. 7s. Qd., Part III. 6s. Reade's Origin of Mountain-Ranges. 21s. Royal College of Surgeons Calendar. Is. Catalogue of Specimens illustrating the Osteology of Vertebrate Animals in Museum. Part 3. Aves. 12s.
Page 102 - ... therefore places where alternating disturbances of a kind suitable to produce decomposition of the molecules are maintained, and may produce strong effects through sympathetic molecular vibration or otherwise ; but at the intermediate antinodes of the magnetic force the individual ultimate atoms may be disturbed by the alternating magnetic force, but there is no tendency to separation of the constituents of the molecule. On the electric theory, therefore, there is abundant justification both...