The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1914 - Physics |
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Common terms and phrases
absorption actinium active deposit alternating current aluminium amperes angle anode apparatus approximately atom atomic weight axis calculated carbon cathode cent CH₂ charge coefficient coil constant corresponding crystal curve deflexion determined diameter discharge distance effect electric field electrometer electrons elements emanation emission energy equal equation Ernest Rutherford experimental experiments films flicker force formula frequency galvanometer gases given gives heating helium hydrogen increase ionization ions J. J. Thomson lines liquid magnetic field maximum measured metal method molecules motion negative observed obtained paper Phil photographic plane plate platinum positive potential pressure produced quantity radiation radium ratio rays from radium reflexion Rockall Rutherford shown solution spectra spectrum string substance surface temperature theory thermionic current thorium tube velocity volts volume wave-lengths waves wire zero
Popular passages
Page 418 - ... out an article which is eminently suitable for its purpose, attractive to the native, and at a price at which the United Kingdom, even in spite of present conditions, appears unable to compete. Comment has been made as to the increased competition from Japan in artificial silk piece goods, and it may not be out of place here to draw attention to the fact that, with regard to piece goods generally for the better class trade, although there is but little criticism as to design, etc., from United...
Page 154 - Rockall is a small isolated rock in mid-Atlantic, lying 184 miles west of St. Kilda ; it has a circumference of only 100 yards and a height of 70 feet, and, except in the very calmest weather, is quite inaccessible. It is the haunt of sea-birds and, with its whitened top, resembles a sailing ship, for which it has often been mistaken. The rock rises from a bank (the " Kockall Bank ") upon which there are several dangerous reefs.
Page 155 - The abundance of basalt-fragments among these drodgings suggests the possibility of Rockall belonging to the same petrographical province as St. Kilda, Iceland, the Inner Hebrides, and the North of Ireland ; hitherto, I believe, no rocks resembling " rockallite " have been found in this province. On the other hand, the existence of borolanite and other alkaline rocks in the Northern Highlands suggests the possibility of Rockall being the western extension of a much older province, which includes...
Page 65 - ... the signal at the same time and can adjust their clocks accordingly. But such a method of adjusting time is inadmissible if one, mindful of the relativity of all motion, shifts his viewpoint from the earth to the sun, and thus regards the earth in motion. For, according to the principle of constant velocity of light, it is clear that those stations which, seen from the central station, lie in the direction of the earth's motion, will receive the signal later than those lying in the opposite direction,...
Page 270 - Since Ra-C gives a penetrating radiation of only half the wavelength of its /C-radiation line, Rutherford and Andrade conclude that : In the case of radium C, and probably also thorium B, which emits an even more penetrating radiation than radium C, another type of characteristic radiation is emitted which is of higher mean frequency than for the "K" series. In other words, it is possible, at any rate in heavy elements, to obtain a line spectrum which is of still higher frequency than the "K" type....
Page 755 - Hills at this period is indicated by striae, by the western limits of Cheviot material in this area and in Northumberland, and by the superficial mingling in the lower Tees Valley of the products of this ice with material brought at an earlier period over Stainmoor. The occurrence of Shup Granite and olivine-basalt erratics is indicated on an accompanying map. The conspicuous kaimes developed about the village of Sheraton and others, associated with the Cheviot Drift, are described. A few remarks...
Page 754 - The Scandinavian Drift of the Durham Coast, and the General Glaciology of South-East Durham.
Page 283 - Upon examination of this table it will be seen that within the limits of experimental error the...
Page 155 - WC Brogger. These rocks, as shown by microscopic study and by a chemical analysis made by Mr. Makins, consist essentially of three minerals — quartz, the felspar albite, and the rare sodapyroxene eegirite, with its dimorphous form acmite.
Page 155 - Endymion, obtained a fragment from this rock, which later found its way into the collection of the Geological Society. More than thirty years afterwards the specimen was recognized ; it was then mislaid for another thirty years, and in 1895 was brought to me by the late Professor T.