Philosophical MagazineTaylor & Francis., 1894 - Physics |
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Page 90
... tube filled with copper filings through the extremities of which tube are inserted two wires which dip into the filings ( without , of course , touching each other inside the tube ) . The filings form , apparently , a continuous column ...
... tube filled with copper filings through the extremities of which tube are inserted two wires which dip into the filings ( without , of course , touching each other inside the tube ) . The filings form , apparently , a continuous column ...
Page 91
... tubes in order to conduct ; but then it becomes difficult to alter their conductivity by mechanical disturbances . On the other hand , a tube filled with very coarse iron filings was found to conduct under all circum- stances ; so that ...
... tubes in order to conduct ; but then it becomes difficult to alter their conductivity by mechanical disturbances . On the other hand , a tube filled with very coarse iron filings was found to conduct under all circum- stances ; so that ...
Page 92
... tubes are affected , which clearly shows that the result is due to the electrical disturbances set up in the leading wires of the tube . In order to establish a closer connexion with the impulsion- cells , it seemed to me that films ...
... tubes are affected , which clearly shows that the result is due to the electrical disturbances set up in the leading wires of the tube . In order to establish a closer connexion with the impulsion- cells , it seemed to me that films ...
Page 94
... tubes of filings . They do not appear to be susceptible to the action . of heat ; but in many instances their conductivity was de- stroyed by breathing upon them , or by allowing a stream of steam to strike their surfaces , the ...
... tubes of filings . They do not appear to be susceptible to the action . of heat ; but in many instances their conductivity was de- stroyed by breathing upon them , or by allowing a stream of steam to strike their surfaces , the ...
Page 135
... tube , and heating it red - hot in a charcoal fire . The wire was then placed in the V - groove of the apparatus , and inserted in the solenoid . The strength of the current was gradually increased , and , at convenient intervals , the ...
... tube , and heating it red - hot in a charcoal fire . The wire was then placed in the V - groove of the apparatus , and inserted in the solenoid . The strength of the current was gradually increased , and , at convenient intervals , the ...
Contents
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Common terms and phrases
acetate amperes amplitude apparatus c-c₁ calculated carbon cent centim chemical chloride coefficient coil consonant interval constant corresponding curve deflexion density determined diameter dilute disk distance distilled disturbance EDWARD WHYMPER effect electric electromotive force energy equal equation error ethyl acetate experiments expression formula fraction gases give given gold-leaf grating heat heat of vaporization Hence herapathite hydrochloric acid hydrogen increase intensity interference light lines lines of curvature liquid Lord Rayleigh magnetic maximum means metal method millim millimetres molecular molecules nitric acid observations obtained optical oxide paper partition Phil plane plate platinum polarization positive pressure produced propyl acetate quantity ratio ridge-lines salt shell sodium solution sound spectrum substances sulphuric acid surface telescope temperature thickness tion tube vapour vapour-pressures velocity vibrations voltameter volume wave-length waves wind wire
Popular passages
Page 175 - ... instances differ, is the effect, or the cause, or a necessary part of the cause of the phenomenon
Page 428 - In the case of any bird soaring, its motion must be sufficiently rapid, so that the action of the inclined surface of its body on the atmosphere may counterbalance its gravity. The force to keep up the momentum of a body moving in a horizontal plane in the air (in which there is so little friction) cannot be great, and this force is all that is wanted.
Page 195 - the change of polarization with time," I would refer especially to the investigation of Dr. E. Root upon this subject, discussed by Professor von Helmholtz, Wisch. Abh., Vol.1., page 835. These experiments by Dr. Root seem to prove clearly that the liberated ions penetrate deeply into the electrode, even when liberated upon but one side of it, as in this case. I take great pleasure in expressing here my thanks and deep obligation to Professor A. Kundt and Dr. L. Arons for their kind sympathy and...
Page 407 - It consists of serpentinized olivine, augite, mica, iron oxide, and a little plagioclase-felspar, with a variable amount of interstitial matter. In many respects it comes very near to the picrite of Inchcolm, which island is 4| miles north of Barnton cutting. It differs from the picrite of Bathgate, and the probability is that the Barnton rock is an offshoot from the same magma as that which supplied the Inchcolm rock.
Page 167 - ... power is in proportion to the chemical affinities producing it; that when it is deficient in force it may be helped by calling in chemical aid, the want in the former being made up by an equivalent of the latter; that, in other words, the forces termed chemical affinity and electricity are one and the same.
Page 428 - ... blended together ; but they were seen distinct against the blue sky. The head and neck were moved frequently, and apparently with force ; and the extended wings seemed to form the fulcrum on which the movements of the neck, body, and tail acted.
Page 428 - ... the fulcrum on which the movements of the neck, body, and tail acted. If the bird wished to descend, the wings...
Page 8 - ... be analogous to that determined experimentally by Brown in the case of two liquids : namely, " the proportion of the three substances in the vapour forming the instantaneous distillate is the same as that of the weights of the three substances in the residue in the still, each weight being multiplied by a suitable constant which is roughly proportional to the vapourpressure of the corresponding liquid.
Page 427 - Demon," to pick out from the internal motions those whose direction is opposed to the main current, and to omit those which are not so, and thus, without the expenditure of energy, to construct a force which will act against the main current itself. But we may go materially further, and not only admit that it is not necessary to invoke here, as Maxwell has done in the case of thermodynamics, a being having...
Page 428 - Except when rising from the ground, I do not recollect ever having seen one of these birds flap its wings. Near Lima, I watched several for nearly half an hour, without once s Loudon's Magazine of Nat. Hist., vol. vii. taking off my eyes: they moved in large curves, sweeping in circles, descending and ascending without giving a single flap.