Philosophical Transactions of the Royal Society of London: Containing papers of a mathematical or physical character. Series AThe Society, 1898 |
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a₁ acid air-layer aneroids aperture apparatus arbitrary function ascending readings B₁ bands bolometer calculated carbonic acid cent centims coefficient coil conductivity constants correlation corresponding curve CXCI.-A descending and ascending determined diameter differential equation disc dx dy electric electrified electrometer electromotive force Emissivity enclosure ethyl alcohol expansion experiments filter fluorescent formula frequency Geissler tube given glass glycerine heat Hence hydrogen inches insulated integral liquid lower m₁ mean mercury metal method millims minutes nitric acid observed obtained occluded ohms organs oxygen palladium black Phil plate platinum pressure probable error quantity radiation range ratio screws sidereal day skewness solution standard deviation stoppage surface t₁ temperature thermal conductivity thickness transited bands tripod tube values variability variation vertical volts wire µ² ди
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Page ix - Janeiro. p. Observatorio. Australia. Adelaide. p. Royal Society of South Australia. Brisbane. p. Royal Society of Queensland. Melbourne. p. Observatory. p. Royal Society of Victoria. AB. University Library. Sydney.
Page 187 - GOTO,! in 1890, led to an interesting discovery that air in an enclosed vessel, previously nonelectrified, becomes electrified by a jet of water falling through it. An investigation of properties of matter concerned in this effect, related as it is to the " development of electricity in the breaking up of a liquid into drops...
Page vii - Body, never interesting themselves any further in their publication, than by occasionally recommending the revival of them to some of their Secretaries, when, from the particular circumstances of their affairs, the Transactions had happened for any length of time to be intermitted. And this seems principally to have been done with a view to satisfy the Public, that their usual meetings were then continued, for the improvement of knowledge, and benefit of mankind, the great ends of their first institution...
Page vii - It is likewise necessary on this occasion to remark, that it is an established rule of the Society, to which they will always adhere, never to give their opinion, as a Body, upon any subject, either of Nature or Art, that comes before them.
Page 214 - ... dull red heat we found but little electrification of the air. When the tube was a little warmer, so as to be quite visibly red hot, large electrification became manifest. Thus 60 strokes of the air-pump gave 45 scale divisions on the electrometer when the tube was dull red, and 395 scale divisions (7 volts) when it was a bright red (produced by a current of 36 amperes). With stronger currents, raising the tube to white-hot temperature, the electrification seemed to be considerably less.
Page 188 - ... altogether unsuitable for the experimental investigations with which we are now concerned. 4. We were, therefore, early led to abandon it; and, for testing the electrification of air, we have used three different methods, one or other of which we have found convenient in different cases. Method (1). Observation of electrification of the substance receiving the electricity equal and opposite to that taken by air in any case of electrification of air. Method (2). Observation of the electricity...
Page 187 - By Lord KELVIN, MAGNUS MACLEAN, and ALEXANDER GALT. [From Roy. Soc. Proc. Vol. LXI. [read June 17, 1897], pp. 483—485 ; Phil. Tram. (A.), Vol. cxci. 1898, pp. 187—228.] 1. IN this paper we describe a long series of experiments on the electrification of air and other gases, with which we have been occupied from May, 1894, up to the present time (June, 1897). Some results of our earlier experiments, and of preliminary efforts to find convenient methods of investigation, have from time to time been...
Page 191 - ... cm. from another and larger metallic disc. This small air condenser was charged from the electric light conductors in the laboratory to a difference of potential amounting to 100 volts. The insulated disc thus charged was removed and laid upon the roof of the large insulated can. This addition to the metal in connection with it does not sensibly influence its electrostatic capacity. The deflexion observed was 122 scale divisions.
Page 214 - ... electrification when pieces of copper foil, and negative electrification when pieces of carbon, were placed in the tube, and when the temperature was sufficient to powerfully oxidise the copper or to burn away the charcoal. 12. Through the kindness of Mr E. Matthey, we have been able to experiment with a platinum tube 1 metre long and 1 mm, bore. It was heated either by a gas flame or an electric current. When the tube was cold, and non-electrified air drawn through it, we found no signs of electrification...