Elements of Galvanism, in Theory and Practice;: With a Comprehensive View of Its History, from the First Experiments of Galvani to the Present Time. Containing Also, Practical Directions for Constructing the Galvanic Apparatus, and Plain Systematic Instructions for Performing All the Various Experiments..
John Murray, 32, Fleet-Street., 1804
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Page 43 - The gas was collected, and found to be a mixture of hydrogene and oxygene, in the proportion of three parts of the former to one of the latter.
Page 81 - I considered that the decomposition must depend on duly proportioning the strength of the charge of electricity to the quantity of water, and that the quantity exposed to its action at the surface of communication depends on the extent of that surface, I hoped that, by reducing the surface of communication, the decomposition of water might be effected by smaller machines, and with less powerful excitation, than have hitherto been used for that purpose ; and, in this hope, I have not been disappointed,...
Page 269 - Egypt: and then it happened, that through all the city, for the space almost of forty days, there were seen horsemen running in the air, in cloth of gold, and armed with lances, like a band of soldiers, and troops of horsemen in array, encountering and running one against another, with shaking of shields, and multitude of pikes, and drawing of swords, and casting of darts, and glittering of golden ornaments, and harness of all sorts.
Page 79 - We see, moreover, in the first experiment, that the zinc, without contact of any other metal, has the power of decomposing water ; and we can have no reason to suppose that the contact of the silver produces any new power, but that it serves merely as a conductor of electricity, and thereby occasions the formation of hydrogen gas.
Page 312 - In this instance, there is a combination of one metal and two dissimilar fluids, which combination constitutes a galvanic circle. In the act of drinking, one side of the pewter pot is exposed to the action of the saliva, which moistens the lip, while the other metallic side is in contact with the porter; the...
Page 82 - Having procured a small wire of fine gold, and given it as fine a point as I could, I inserted it into a capillary glass tube ; and, after heating the tube so as to make it adhere to the point, and cover it in every part, I gradually ground it down, till, with a pocket lens, I could discern that the point of the gold was exposed.
Page iii - Elements of Galvanism in theory and practice ; with a comprehensive view of its History, from the first experiments of Galvani to the present time. Containing also practical directions for constructing the galvanic apparatus and plain systematic instructions for performing all the various experiments.
Page 82 - I inserted it into a capillary glass tube; and after heating the tube, so as to make it adhere to the point and cover it in every part, I gradually ground it down, till with a pocket lens, I could discern that the point of the gold was exposed. The success of this method exceeding my expectations I coated several wires in the same manner, and found that when sparks from the conductors before mentioned were made to pass through water by means of a point so guarded, a spark passing to the distance...
Page 73 - Of two phenomena, or of two series of phenomena, we can only affirm that the one is the cause of the other when it uniformly precedes it, and when their modifications are connected. But it appears from all the foregoing facts, that the galvanic pile of Volta acts only when the conducting substance between the plates is capable of oxidating the zinc; and that in proportion as a greater quantity of oxygen enters into combination with the zinc in a given time, so in proportion is the power of the pile...
Page 73 - Volta acts only when the conducting substance between the plates is capable of oxydating the zinc ; and that in proportion as a greater quantity of oxygen enters into combination with the zinc, in a given time, so in proportion is the power of the pile to decompose water, and to give the shock greater.