The London, Edinburgh and Dublin Philosophical Magazine and Journal of ScienceTaylor & Francis, 1910 - English periodicals |
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Common terms and phrases
absorption æther aluminium amalgam angle apparatus approximately atom axis B-rays bands Bessel functions cadmium calculated calorimeter cathode cells cent centimetres centre charge coefficient coil constant corpuscle corpuscular radiation corresponding curve deflexion density determined diameter disk distance effect electric field electrons electroscope energy equal equation experiments flicker force formula function galvanometer given halos heat homogeneous increase ionization ions J. J. Thomson lead leak liquid magnetic maximum mean measured mercury metals method millimetre molecules motion negative observed obtained paper particles Phil pitchblende plate polonium positive pressure produced Purkinje effect quantity quartz radium radium bromide ratio rays resistance Reststrahlen secondary shear stress shown sin² solution sphere stress surface temperature theory thermometer thickness tube uranium vapour variation velocity vessel volts wave-length wire y-rays zero
Popular passages
Page 543 - The rule therefore for obtaining the greatest galvanometer deflexion in a given system is as follows : Of the two resistances, that of the battery and that of the galvanometer, connect the greater resistance so as to join the two greatest to the two least of the four other resistances.
Page 218 - ... to eliminate entirely the error due to evaporation. It was not found possible to balance the cloud, as had been originally planned, but it was found possible to do something much better: namely, to hold individual charged drops suspended by the field for periods varying from 30 to 60 seconds. I have never actually timed drops which lasted more than 45 seconds, although I have several times observed drops which in my judgment lasted considerably longer than this. The drops which it was found possible...
Page 823 - The nietaruorphic aureole is very large, measuring about 6 miles from east to west and 5 miles from north to south. This is out of all proportion to the size of the visible exposures of granite, and it is inferred that the intrusion underlies a large area at a small depth.
Page 218 - ... which it was found possible to balance by an electrical field always carried multiple charges, and the difficulty experienced in balancing such drops was less than had been anticipated. The procedure is simply to form a cloud and throw on the field immediately thereafter. The drops which have charges of the same sign as that of the upper plate or too weak charges of the opposite sign, rapidly fall, while those which are charged with too many multiples of sign opposite to that of the upper plate...
Page 218 - INDIVIDUAL CHARGED DROPS BY AN ELECTROSTATIC FIELD My original plan for eliminating the evaporation error was to obtain, if possible, an electric field strong enough exactly to balance the force of gravity upon the cloud and then by means of a sliding contact to vary the strength of this field so as to hold the cloud balanced throughout its entire life. In this way it was thought that the whole evaporation-history of the cloud might be recorded, and that suitable allowances might then be made in...
Page 445 - The riddle of the nebulae was solved. The answer, which had come to us in the light itself, read: Not an aggregation of stars, but a luminous gas.
Page 211 - A New Modification of the Cloud Method of Determining the Elementary Electrical Charge and the Most Probable Value of That Charge.
Page 277 - Cd concentration. Diffusion tends to restore uniformity, and in consequence the cell is unstable for a very considerable time, the emf rising. (2) When the amalgam is at a temperature near to, but below, the first transition-point, the difference of concentration between the inner and outer parts of the amalgam need be only small to enable the outer shell to be a two-phase system. Owing to the small difference of Cd-concentration throughout the mass, the diffusion process will be slow and the emf...
Page 218 - Chicago began experiments designed to overcome this error. He wrote: "My original plan for eliminating the evaporation error was to obtain, if possible, an electric field strong enough exactly to balance the force of gravity upon the cloud. It was not found possible to balance the cloud, as had been originally planned, but it was found possible to do something much better: namely, to hold the individual charged drops suspended for periods varying from 30 to 60 seconds.
Page 221 - ... to evaporate appreciably before the reading is completed, the time required to pass through the second space should be greater than that required to pass through the first space. It will be seen from the observations which follow that this was not, in general, the case. It is an exceedingly...