Optical Properties. 



7305 



Hutchins. 57693. Effect of the 

 cathode ravs in changing the colors of 

 certain minerals. 



Ilosvay. 57703. Uniwandlung der 

 Elemente. (Ungarisch.) 



Jessup, A. C. & Jessup, A. E. 57834. 

 Evolution and devolution of the elements. 



Kinoshita. 58130. C!ondensation of 

 tilt' actinium and thorium emanations. 



Kleeman. 58176. Different kinds of 

 7 lays of radium, and the secondarj' 7 

 rays which they jDroduce. 



Laby & Kaye. 58567. [lonization- 

 2:)ressure curves for hydrogen, air and 

 car])on dioxide, when contained in an 

 aluminium vessel and exjfjosed to hard 

 7 rays from radium.] 



Loeb. 58979. Hyiiothesis of radiant 

 matter. , 



McClelland. 59201 . Secondary ;3-rays. 



Moore. 59808. Decay of the radium 

 emanation when dissolved in water. 



Morse. 59857. Kathodo-himinescence 

 of fluorite. 



Perkins. 00472. Molecular weight 

 of radinm emanation by the comparison 

 of its rate of diffusion with that of 

 mercury vapour. 



Ramsay. 60886. Nonvel element, le 

 radiothorium, dont I'emanatiou est 

 identique a celle du thorium. 



Richardson. 61069. lonisation pro- 

 duced liy hot platinum in different gases 

 [oxygen, air, nitrogen, helium, and 

 hydrogen]. 



Russ. 61370. Transmission of the 

 active deposit from radium emanation 

 to the anode. 61371 : Distribution in 

 electric fields of the active deposits of 

 radium, thorium and actinium. 61372 : 

 Electrical cliarge of the active deposit of 

 actinium. 



Rutherford. 61382. Radium emana- 

 tion. (1) Volume of the emanation. 



& Geiger. (il385. Charge 



and nature of the a-particle. 



&Petavel. 61386. Effect 



of high temperature on the activity of 

 the products of radium. 



& Royds. 61387. Nature 



of the a-particle. 61388 : Spectrum of 

 tiie radium emanation. 61389 : Action 

 of the radium emanation upon water. 



Satterly. 61481. Amount of radium 

 emanation in the atmosphere. 



Schmidt. 61658. Von trocknenden 

 Oeien ausgehende Strahlungserschei- 

 nungen. 



Sidgwick & Tizard. 6194G. Initial 

 change of the radium emanation. 



Soddy. 62063. Attempts to detect 

 tlie production of helium from tlie 

 primal y radio-elements. 



Thomson. 02603. Nature of the 

 7-j:iy.s. 62604 : \'elocit3' of secondary 

 cathode rays from gases. 



Wilderman. 63340, Piles actionnees 

 par la lumiere. 



Badioactivity. 



Bertoni, [G.]. 54380. Radioactivite 

 des sources thermales de la Perla. 



Boltwood. 54621. Ionium, a new 

 radioactive element. 



Bordas. 54639. Eormation de cer- 

 taines pierres precieuses de la famille 

 des aluminides. 



Brochet. 54822. Radioactivite des 

 eaux de Plombieres. 



Bronson. 54836. Relative activity 

 of the emanation and the active deposit; 

 from thorium and from actinium. 



Campbell. 55044. Radioactivity of 

 potassium, with special reference to 

 solutions of its salts. 



Debierne. 5.5503. Radioactivite. 



Greinacher. 5(5802 Fortschritte der 

 liadioactivitat. 



Gruner. 56884. Konstanten der 

 Radioaktivitat. 



Joly. 57882. Radioactivity of sea- 

 water. 



Lucas. 59105. Radioaktive Stoffe. 



McCoy & Ashman. 59206. Prepar- 

 ation of urano-uranic oxide, LJsOg, and a 

 standard of radio-activity. 



& Ross. 59208. Specific 



radioactivity of uranium. 59209 : Spe- 

 cific radioactivity of thorium and the 

 variation of the activity with chemical 

 treatment and with time. 



McLennan. 59241. Radioactivity of 

 ordinary metals and on the penetrating 

 radiation from the earth. 



& Kennedy. 59242. Radio- 

 activity of 230tassium and otiier alkali 

 metals. 



