The Annals of Electricity Magnetism and Chemistry and Guardian of Experimental Science, Band 9 |
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Seite 7
The electroscope at the middle point C has now a negative divergence , equal to
that of the electroscope at B in the insulated state of the column ; and the
divergence at B is nearly double . Then , by observing the state of the other parts
of the ...
The electroscope at the middle point C has now a negative divergence , equal to
that of the electroscope at B in the insulated state of the column ; and the
divergence at B is nearly double . Then , by observing the state of the other parts
of the ...
Seite 12
wax , which thus becomes negative . I shall explain the phenomena produced by
the latter , because it retains longer the effect of friction ; those produced by
naked glass are of the same nature , only reversed . Exp . 13 . A glass rod
covered ...
wax , which thus becomes negative . I shall explain the phenomena produced by
the latter , because it retains longer the effect of friction ; those produced by
naked glass are of the same nature , only reversed . Exp . 13 . A glass rod
covered ...
Seite 26
must have been negative electrical to the atmosphere , prior to their receiving
their respective charges from it ; and as those electric charges were not
communicated to the wires prior to their ascent , it is obvious , also , that they
were received ...
must have been negative electrical to the atmosphere , prior to their receiving
their respective charges from it ; and as those electric charges were not
communicated to the wires prior to their ascent , it is obvious , also , that they
were received ...
Seite 495
currents proceeding from the action of several voltaic elements . The wire
attached to the negative pole is always seen to be covered with precipitated
metal : but the determination of oxygen and acid at the positive polar wire ,
cannot always ...
currents proceeding from the action of several voltaic elements . The wire
attached to the negative pole is always seen to be covered with precipitated
metal : but the determination of oxygen and acid at the positive polar wire ,
cannot always ...
Seite 536
He states , for instance , that the rapid diminution and early cessation of the
current by ordinary batteries , are due to the deposition of zinc on the negative
plates of each pair . On this point we perfectly agree : the annihilating
counteraction ...
He states , for instance , that the rapid diminution and early cessation of the
current by ordinary batteries , are due to the deposition of zinc on the negative
plates of each pair . On this point we perfectly agree : the annihilating
counteraction ...
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acid action animal apparatus appears atmosphere ball battery become body called carbon cause charge chemical circuit circumstances clouds colour column combination communication conducting conductor connected consequently considerable contained continued copper described diameter direction discharge distance effect electric fluid employed equal experiments explained extremity fact fire force former give given glass gold greater ground heat hydrogen inches increase influence intensity iron kind length less light liquid magnetism manner matter means metal motion nature needle negative nitric acid observed obtained operation oxide oxygen particles passing phenomena piece plate platinum pole portion positive present produced Professor proportion proved quantity received remains separated side silver solution spark striking substances sufficient supposed surface taken theory tion tube whole wire zinc
Beliebte Passagen
Seite 427 - ... a wire down the outside of the building into the ground, or down round one of the shrouds of a ship, and down her side till it reaches the water?
Seite 414 - To determine the question whether the clouds that contain lightning are electrified or not, I would propose an experiment to be tried where it may be done conveniently.
Seite 151 - By exposure to excessive cold the primitive fungi are killed, but their seed still retains vitality, and, if immersed in snow, which appears to be their native soil, they reproduce new fungi, which are generally of a red colour. The Philosophical Transactions for 1823 contains the paper by Mr. Bauer already alluded to, entitled " Microscopical Observations on the Suspension of the Muscular Motions of the Vibrio tritici," which forms the Croonian Lecture for that year.
Seite 336 - The declaration was in the usual form, and the defendants pleaded thereto, first, that they were not guilty; secondly, that the plaintiff was not the...
Seite 414 - ... or 30 feet, pointed very sharp at the end. If the electrical stand be kept clean and dry, a man standing on it when such clouds are passing low, might be electrified and afford sparks, the rod drawing fire to him from a cloud.
Seite 377 - Fig. 9,) big enough to contain a man and an electrical stand. From the middle of the stand let an iron rod rise and pass bending out of the door, and then upright twenty or thirty feet, pointed very sharp at the end. If the electrical stand be kept clean and dry, a man standing on it, when such...
Seite 484 - ... will give a spark at a greater distance. Two gun-barrels united, and as highly electrified, will give a spark at a still greater distance. But if two gun-barrels electrified will strike at two inches distance, and make a loud snap, to what a great distance may 10,000 acres of electrified cloud strike and give its fire, and how loud must be that crack?
Seite 414 - If any danger to the man should be apprehended (though I think there would be none) let him stand on the floor of his box, and now and then bring near to the rod the loop of a wire that has one end fastened to the leads, he holding it by a wax handle ; so the sparks, if the rod is electrified, will strike from the rod to the wire, and not affect him.
Seite 377 - I say, if these things are so, may not the knowledge of this power of points be of use to mankind, in preserving houses, churches, ships, &V. from the stroke of lightning, by directing us to fix on the highest parts of those edifices, upright rods of iron made sharp as a needle, and gilt to prevent rusting, and from the foot of those rods a wire down the outside of the building into the ground, or down round one of the shrouds of a ship...
Seite 73 - The mutual action between the elements of the food and the oxygen conveyed by the circulation of the blood to every part of the body is the source of animal heat. " All living creatures whose existence depends on the absorption of oxygen possess within themselves a source of heat independent of surrounding objects.