Proceedings of the Royal Society of London, Том 63Taylor & Francis, 1898 |
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Сторінка vi
... Aluminium as an Electrode in Cells for Direct and Alternate Currents . By E. Wilson . Communicated by Dr. J. Hopkinson , F.R.S. Contributions to the Study of " Flicker . " By T. C. Porter , Eton College . Communicated by Lord Rayleigh ...
... Aluminium as an Electrode in Cells for Direct and Alternate Currents . By E. Wilson . Communicated by Dr. J. Hopkinson , F.R.S. Contributions to the Study of " Flicker . " By T. C. Porter , Eton College . Communicated by Lord Rayleigh ...
Сторінка 102
... aluminium , nickel , & c . , should be able to give off at ordinary temperatures in a few days sufficient vapour to act strongly on a photographic plate , and that such vapour should be able to pass rapidly through media , such as ...
... aluminium , nickel , & c . , should be able to give off at ordinary temperatures in a few days sufficient vapour to act strongly on a photographic plate , and that such vapour should be able to pass rapidly through media , such as ...
Сторінка 112
... aluminium , and fusible metal can act in the same way , whereas lead , nickel , tin , silver , sodium , and , as far as experiments have gone , all the inactive metals , have no such power . This reaction is still being investigated ...
... aluminium , and fusible metal can act in the same way , whereas lead , nickel , tin , silver , sodium , and , as far as experiments have gone , all the inactive metals , have no such power . This reaction is still being investigated ...
Сторінка 117
... aluminium is positive to zinc and zinc positive to copper . Also , when a plate becomes more positive its potential will be said to rise ; when more negative , to fall . When the " potential " of a plate is mentioned , without other ...
... aluminium is positive to zinc and zinc positive to copper . Also , when a plate becomes more positive its potential will be said to rise ; when more negative , to fall . When the " potential " of a plate is mentioned , without other ...
Сторінка 120
... Aluminium . Polishing agents in order of Old hard plates . High conductivity . sharpness of surface produced . Poten- Average Poten- Average Poten- Average Average Poten- tial in volts . Poten- tial . Remarks . tial in volts . Poten ...
... Aluminium . Polishing agents in order of Old hard plates . High conductivity . sharpness of surface produced . Poten- Average Poten- Average Poten- Average Average Poten- tial in volts . Poten- tial . Remarks . tial in volts . Poten ...
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Proceedings of the Royal Society of London, Том 18 Royal Society (Great Britain) Повний перегляд - 1870 |
Proceedings of the Royal Society of London, Том 13 Royal Society (Great Britain) Повний перегляд - 1864 |
Proceedings of the Royal Society of London, Том 58 Royal Society (Great Britain) Повний перегляд - 1895 |
Загальні терміни та фрази
acid action alcohol aleurone-layer aluminium ammonia ampere antitoxin Apogamy apparatus appear argon atoms axis ball band bodies calories calorimeter carbon cells cent chamber chlorophyll coefficient colour compounds copper crystalline crystals cubic curves density determined developed diameter direction disc effect electric electrometer embryo endosperm equation experiments F.R.S. Received film gelatin given glass glass-paper grams heat hydrogen hysteresis inches increased iodine J. J. Thomson John Carrick kathode fall larvæ layer light lines liquid oxygen LXIII magnetic susceptibility mean metal method minutes molecular molecules molybdate nerve Observatory observed obtained oxide paper phosphorus photographic plate plane polarisation polished positive potential produced Professor pyrogallol rotation salt Schunck sheet silver silver iodide sodium solution spectrum spherulitic stomata structure substance sun-spot surface surfusion Table temperature tion toxin tube vapour variation volt volts volume weight zinc
Популярні уривки
Сторінка 259 - NN liquefaction of air to that of hydrogen is relatively as great in the thermodynamic sense as that from liquid chlorine to liquid air, the fact that the former result has been achieved in one-fourth the time needed to accomplish the latter proves the greatly accelerated race of scientific progress in our time.
Сторінка xv - February, 1821, Mr. Baily was elected a Fellow of the Royal Society. He was also a Member of the Linnean and Geological Societies, but I am unable to state the precise date of his election in either. In 1825 he retired from the Stock Exchange, after a career in which his consummate habits of business, his uprightness, intelligence, and prudence, had established his fortune, and might, if continued...
Сторінка 420 - ... surface it instantly curves strongly away from the transpiring surface. In the hygroscope the degree of curvature is read off on a graduated quadrant, and in this way a numerical indication of the condition of the stomata is obtained. The instrument makes no claim to accuracy, but has proved extremely useful when used comparatively to indicate and localise small changes in the transpiration of leaves, and therefore, by implication, changes in the condition of the stomata. By observing under the...
Сторінка 74 - ... the two magnetic curves, it would seem, in the face of such evidence, that the supposition that such agreement is probably only accidental coincidence can scarcely be maintained, and there would appear to be no escape from the conclusion that such close correspondence, both in period and activity, indicates a more or less direct relation between the two phenomena or otherwise the existence of some common cause producing both.
Сторінка 422 - In other cases there is a slow rise up to the highest point, which occurs between n am and 3 pm The hygroscope generally sinks to zero within an hour after sunset. The effect of heat has not been fully studied, but enough has been done to confirm previous observers who find that heat opens the stomata. • As regards the visible spectrum, I find that the red rays are decidedly most efficient, but I am not able to find any evidence of a secondary maximum in the blue, such as Kohl (Bieblatt air Leopoldina,...
Сторінка 260 - Institution, the invaluable aid of Mr Robert Lennox has been at my disposal, and it is not too much to say that, but for his engineering skill, manipulative ability and loyal perseverance, the present successful issue might have been indefinitely delayed.
Сторінка 95 - Maxwell's equation, expressing that the line integral of the electromotive intensity round a closed circuit is equal to the rate of decrease of the magnetic induction through the circuit, needs no modification when the propagation of disturbances through the above medium is considered.
Сторінка 412 - In order to determine as far as possible which lines belong to the argon spectrum, and which to the new gas, both spectra were examined at the same time with the grating, the first order being employed. The lines which were absent, or very feeble, in argon, have been ascribed to the new gas. Owing to their feeble intensity, the measurements of the wave-lengths which follow must not be credited with the same degree of accuracy as the three already given, but the first three digits may be taken as...
Сторінка 423 - ... irritability. Some observers insist on the preponderant influence of the guard; cells, while Leitgeb in the same way exaggerated the importance of epidermic pressure, whereas the two factors should, as far as possible, be considered as parts of a whole and as correlated rather than opposed in action. I have also attempted to show how the stoma, like other parts of the plant, may be supposed to react adaptively to those signals, which we usually call stimuli. The attempt which I have made to rank...
Сторінка 137 - Volta-condenser, becomes positive to another platinum disc which had not been so treated, but had simply been left undisturbed in the apparatus. The positive quality thus produced by the hydrogen diminishes gradually, and becomes insensible after two or three days. PS — On December 24, 1880, one of...