Handbook of Natural Philosophy: Electricity, magnetism, and acousticsWalton & Maberly, 1868 |
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Загальні терміни та фрази
acid action Ampère's apparatus attraction austral axis ball battery bismuth body boreal centre charged circular circulating current coating coils combination conducting wire conductor connected copper current passes cylinder decomposed decomposition diamagnetic dipping needle disc distance earth effect electrified electro-magnet electrolyte electroscope equal experimental glass helical current helix horizontal hydrogen imparted induction intensity length Leyden jar liquid machine magnetic meridian magnetic needle magnetic pole magnetised manner mercury metallic molecule motion negative electrode negative fluid negative pole nitric acid nodal lines nonconductor north pole oxygen phenomena pile placed plane plate positive electricity positive fluid produced quantity rectilinear current rendered repelled represented in fig repulsion revolve right angles round shown in fig soft iron solution sound south magnetic pole south pole spiral sulphuric acid surface suspended tricity tube undulations vertical vessel voltaic current voltaic pile wave zinc
Популярні уривки
Сторінка viii - The perspicuity of the original has been retained, and chapters which had become obsolete, have been replaced by others of more modern character. The explanations throughout are studiously popular, and care has been taken to show the application of the various branches of physics to the industrial arts, and to the practical business of life.
Сторінка 108 - The explanation given in (166. to 1 68.), of the mode in which the galvanic current is generated, when a plate of zinc and a plate of copper are immersed in dilute acid, suggests a reason for what has been universally found in practice to be a necessary condition for the production of a continuous current ; namely, that one at least of the three substances employed should be a liquid. For it is evident that when the stage of the process represented vajig.
Сторінка vii - Mining Journal. THE HANDBOOK of HYDROSTATICS and PNEUMATICS. New Edition, Revised and Enlarged by BENJAMIN LOEWY, FRAS With 236 Illustrations. Post 8vo, 5^. cloth. " For those ' who desire to attain an accurate knowledge of physical science without the profound methods of mathematical investigation,' this work is not merely intended, but well adapted.
Сторінка 220 - ... them so as to exercise opposite deflecting forces on the needle. The deviation of the needle in this case measures the difference of the intensities of the two currents. 355. Great sensitiveness of these instruments illustrated. — The extreme sensitiveness and extensive utility of these reoscopic apparatus will be rendered apparent hereafter. Meanwhile it may be observed that if the extremities p and n of the conducting wires be dipped in acidulated water, a slight chemical action will take...
Сторінка 146 - In the case here contemplated, the length of the wire carrying the current being considerable, each part of it exercises a separate force on N, and the entire force exerted is consequently the resultant of an infinite number of forces, just as the weight of a body is the resultant of the forces separately impressed by gravity on its component molecules. LAPLACE has shown that the indefinitely small parts into which the current may be supposed to be divided, exert forces which are to each other in...
Сторінка 221 - These conductors are carried for some distance parallel to each other, and as close together as convenient ; by this means the portion of the current which is approaching the apparatus and the portion which is leaving it are made to neutralise each other as to any effect they might produce upon the magnet m. The current passing round the circle BCD causes the magnet to be deflected to the right or the left according to the direction in which it moves ; and, when the magnet is short in comparison...
Сторінка 307 - ... the head . at the moment when the connexion is made or broken, and a roaring sound will be heard so long as the connexion is maintained. 500. [Development of electricity in the animal organism. The chemical processes which go on in the voltaic battery having been shown to be attended with the development of enormous quantities of electricity, it is reasonable to expect that the countless and complex chemical changes which take place in the bodies of animals must likewise give rise to electrical...
Сторінка 289 - The copper conductor had therefore a superficial area of 8,300 square feet, and the external surface of the gutta percha amounted to 30,000 square feet. During the experiments, the cable was immersed in water, and three reometers were connected with it at different points, one near each end, and one near the middle, so as to indicate whatever currents passed through it. One end of the cable being connected with the ground, and the opposite end with one pole of a battery, the other pole of which was...
Сторінка 77 - Ether and alcohol ignited. — Ether or alcohol may be fired by passing through it an electric discharge. Let cold water be poured into a wine-glass, and let a thin stratum of ether be carefully poured upon it. The ether being lighter will float on the water. Let a wire or chain connected with the prime conductor of...
Сторінка 406 - ... ascertaining the rate at which the wings of such creatures flap. The instrument being brought into unison with the sound produced by the insect indicates, as in the case of any other musical sound, the rate of vibration. In this way it has been ascertained that the wings of a gnat flap at the rate of l 5000 times per second.