Proceedings of the Royal Society of London, Volume 67Taylor & Francis, 1901 - Electronic journals Obituary notices of deceased fellows were included in v. 7-64; v. 75 is made up of "obituaries of deceased fellows, chiefly for the period 1898-1904, with a general index to previous obituary notices"; the notices have been continued in subsequent volumes as follows: v. 78a, 79b, 80a-b- 86a-b, 87a 88a-b. |
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Page 403 - ... as h or C itself. The observation was difficult, however, and required the most scrupulous exclusion of foreign light, and a careful adjustment of the slit, in the plane of the solar image formed by these particular rays. They were also found to be regularly reversed upon the body of the sun itself, in the penumbra and immediate neighbourhood of every important tpot.
Page 459 - The nitrogen spectrum disappeared after some sparking, but the tulw still shows rays of argon as well as those of the gases in the other tubes. On examining the spectrum of the negative pole in the neighbourhood of the principal nebular green ray, a weak ray was seen in addition to those given by the other tubes. It was found by comparison with the nitrogen rays A.
Page 456 - ... and it was explosive when mixed with more oxygen. This shows conclusively that hydrogen in sensible proportion exists in the earth's atmosphere, and if the earth cannot retain hydrogen or originate it then there must be a continued accession of hydrogen to the atmosphere (from interplanetary space), and we can hardly resist the conclusion that a similar transfer of other gases also must take place.
Page 402 - India, accompanied by the worst famine experienced during the century, suggested to us the desirability of reconsidering the question, especially as we have now some new factors at our disposal. These have been revealed by the study, now extending over twenty years, of the widened lines in sunspots, which suggested the view that two effects ought to be expected in a sunspot cycle instead of one. 1 "Cycles of Drought and Good 'leax n> in South Africa, 1889.
Page 457 - Leyden jar in the circuit, while it more or less completely obliterates the second spectrum of hydrogen, also has a similar effect on the greater part of these other rays of, as yet, unknown origin. The violet and ultra-violet part of the spectrum seems to rival in strength that of the red and yellow rays, if we may judge of it by the intensity of its impressions on photogr.iphic plates.
Page 415 - ... due to a common cause, that is, to a subsidiary solar pulse. We propose to return to this subject in a subsequent communication, after inquiries have been completed relating to 1885-6 and 1896-7. The Intervals between the Pulses. There will obviously be intervals between the ending of one pulse and the beginning of the next, unless they either overlap or become continuous. The + and — pulses, to which our attention has been chiefly directed, are limited in duration ; and when they cease the...
Page 137 - A FORMER paper* describes the apparatus by which I examined the influence of temperature upon the viscosity of argon and other gases. I have recently had the opportunity of testing, in the same way, an interesting sample of gas prepared by Professor Dewar, being the residue, uncondensed by liquid hydrogen, from a large quantity collected at the Bath springs. As was to be expected^, it consists mainly of helium, as is evidenced by its spectrum when rendered luminous in a vacuum tube.
Page 226 - ... of the tube free at either end. On allowing the tube to cool a perfect contact between the iron and marble was obtained, and it was no longer possible to withdraw the latter.
Page 228 - In six other cases the structures bore certain analogies to those in the deformed rock but were of doubtful origin, while in the remaining twenty the structure was different. The following is a summary of the results arrived at : — 1. By submitting limestone or marble to differential pressures exceeding the elastic limit of the rock and under the conditions described in this paper, permanent deformation can be produced. 2. This deformation, when carried out at ordinary temperatures, is due in part...
Page 456 - U-tube showed on sparking no spectrum of any of these last-mentioned gases, but showed the spectra of hydrogen, helium, and neon brilliantly, as well as a great many less brilliant rays of unknown origin. In addition, they showed at first the brightest rays of mercury, derived, no doubt, from the mercury pump hy which they had been exhausted before the admission of the gases from the liquefied air.