Electric Science; Its History, Phenomena, and Applications

Front Cover
Ingram, Cooke, 1853 - Electric conduits - 199 pages

What people are saying - Write a review

User Review - Flag as inappropriate

Ver página 63. Máquina de correia.

Other editions - View all

Common terms and phrases

Popular passages

Page 20 - Your question, how I came first to think of proposing the experiment of drawing down the lightning, in order to ascertain its sameness with the electric fluid, I cannot answer better than by giving you an extract from the minutes I used to keep of the experiments I made, with memorandums of such as I purposed to make, the reasons for making them, and the observations that arose upon them, from which minutes my letters were afterwards drawn. By this extract you will see, that the thought was not so...
Page 17 - From this experiment may be seen the danger, even under the greatest caution, to the operator, when making these experiments with large jars; for it is not to be doubted, but...
Page 20 - Firing inflammable substances. 12. Sulphureous "smell. The electric fluid is attracted by points. "We do not know whether this property is in lightning. " But since they agree in all the particulars wherein "we can already compare them, is it not probable they "agree likewise in this? Let the experiment be made.
Page 15 - ... been exposed, is taken away, it throws out a pencil of flame so long, that with this burning machine in my hand, I have taken above sixty steps in walking about my room. When it is electrified strongly, I can take it into another room, and there fire spirits of wine with it. If, while it is electrifying, I put my finger, or a piece of gold which I hold in my hand, to the nail, I receive a shock which stuns my arms and shoulders.
Page 114 - The left side was most powerfully convulsed at each renewal of the electric contact. On moving the second rod from the hip to the heel, the knee being previously bent, the leg was thrown out with such violence as nearly to overturn one of the assistants, who in vain attempted to prevent its extension.
Page 126 - ... if the electrical power which holds the elements of a grain of water in combination, or which makes a grain of oxygen and hydrogen in the right proportions unite into water when they are made to combine, could be thrown into the condition of a current, it would exactly equal the current required for the separation of that grain of water into its elements again.
Page 86 - ... negative above, as the case may be : and this discharge may take place, according to the laws of Electricity, through any or all of the surrounding zones, without influencing their respective electricities otherwise than by weakening their force, by the removal of a portion of the electric fluid from the central nucleus above to that below : every successive flash from the cloud to the earth, or from the earth to the cloud, weakening the charge of the plate of air, of which the cloud and the...
Page 41 - I conceive the effects to arise from forces which are internal, relative to the matter under decomposition — and not external, as they might be considered, if directly dependent upon the poles. I suppose that the effects are due to a modification, by the electric current, of the chemical affinity of the particles through or by which that current is passing, giving them the power of acting more forcibly in one direction than in another, and consequently making them travel by a series of successive...
Page 125 - ... the chemical decomposing action of a current is constant for a constant quantity of electricity, notwithstanding the greatest variations in its sources, in its intensity, in the size of the electrodes used, in the nature of the conductors (or non-conductors (307.)) through which it is passed, or in other circumstances.
Page 17 - ... or folded together, as it were, the joints losing their strength and stiffness at once, so that he drops on the spot where he stood, instantly, and there is no previous staggering, nor does he ever fall lengthwise. Too great a charge might, indeed, kill a man, but I have not yet seen any hurt done by it. It would certainly, as you observe, be the easiest of all deaths.

Bibliographic information