Radium. 



529 



0620 



PtO 



PLATINUM OXIDES. 



WoMer, Lothar. Die Oxyde des 

 Platins. Zs. anorg. Chem., Hamburg, 

 40, 1904, (423-464). 



Platinum Salts. 



Platinum Sulphate. 



Stuchlik, Leo. Analyse des von 

 Margules dargestellten Platinsulfates. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (2913-2915). 



0620 (Rd) RADIUM. 



Die Zersetzangstheorie der Radioak- 

 tivitat. Von W. Oest. Zs. BergHutt- 

 Wes., Wien, 52, 1904, (286-288). ' 



Ueber Radium. Yon. W. Oest. Zs. 

 BergHiittWes., Wien, 52, 1904, (230- 

 231). 



Ackroyd, William. Tlie action of 

 radium rays on the halides of the 

 alkali metals and analogous heat effects. 

 London, .J. Chem. Soc,' 85, 1901, (812- 

 817j; [abstract] London, Proc. Chem. 

 Soc, 20, 1904, (108). 



Experiments and observa- 

 tions with radium compounds. London, 

 Rep. Brit. Ass., 1903, 1904. (639-640). 



Adams, E. P. Water radio-activity. 

 Phil. iJag., London, (ser. 6), 6, 1903, 

 (.563-.569); 



Beckenhaupt, C. Die Urkraft im 

 Radium und die Sichtbarkeit der Kraft- 

 zvistiinde. Heidelberg (G. Winter), 1904, 

 (.39) 23 cm. 1 M. 



Besker, A. Unsere gegenwiirfigen 

 Kenntuisse iiber Radioaktivitat. Xatw. 

 Wochenschr., Jena, 19, 1904, (993-999, 



1012-1016). 



Becquerel, Henri. Ueber die von 

 der Straldiing radioaktiver Korper her- 

 vorgerufeue sekundiire Strahlung. Phy- 

 sik.Zs., Leipzig, 5, 1904, (561-563). 



Beyer, H. Otley. Radium. [Its 

 history.] Chem. News, London, 90, 

 1904,\2.55). 



Boltwood, B[ertram] B[orden]. On 

 the ratio of radium to uranium in some 

 minerals. Amer. J. Sci., New Haven, 

 Conn., (Ser. 4), 18, 1904, ([97]-10.3, with 

 test fig.). 

 (1^9724) 



Bouchard, Ch., Curie, P. et Balthazard, 



V. Action physioiogique del'emanation 

 du radium. Paris, C.-R. Acad, sci., 138, 

 19(34, (1384-13S7). 



Bragg, W. H. On the absorption of 

 a rays ; and on the classification of the 

 a rays from radium. Phil. Mag., London, 

 (Ser. 6), 8, 1904, (719-725, with pi.). 



and Kleeman, R. On the 



ionization curves of radium. Phil. 

 Mag., London, (Ser. 6), 8, 1904, (72C- 

 7.38). 



Br0gger, W. C. Ores of uranium 

 containing helium and radium. (Norw.). 

 Pharmacia, Kristiania, 1, 1904, (49- 

 53, 65-70). 



Brooks, H. Miss. The decay of the 

 excited radioactivity from thorium, 

 radium and actinium. Phil. Mag., Lon- 

 don, (Ser. 6), 8, 1904, (373-384). 



Bumstead, H. A. and Wheeler, L. P. 



On the properties of a radio-active gas 

 found in the soil and water near New 

 Haven. [Due to presence of radium.] 

 Amer. J. Sci., Xew Haven, Conn., (Seiv 

 4), 17, 1904, ([97J-111, with text fig.). 



Coehn, Alfred. Leber das elektro- 

 chemische V'erhalten des Radiums. 

 Berlin, Ber. D. chem. Ges., 37, 1904, 

 (811-816). 



Crookes, William. On the action of 

 radium emanations on diamond. Lon- 

 don, Proc. R. Soc, 74, 1904, (47-49). 



Curie, E. Radium. [Translated from 

 a lecture delivered . . . before the 

 Royal institution of London, as printed 

 in the Revue scientifique Eebruary 13, 

 1904] in Washington, D.C. Smithsonian 

 Inst., Rep., 1903, 1901, (1 /. + 187-193, 

 with fig. in text). Separate. 24.5 cm 



Curie, P. Xeuere Untersuchungea 

 iiber Radioaktivitat. Physik. Zs., Leip- 

 zig, 5, 1904, (281-289, 313-318, 345- 

 349). 



et Danne, J. Sur la dis- 



parition de la radioactiviic induite pat 

 le radium sur les corps solides. Paris, 

 C.-It. Acad, sci., 138, 1904, (683-686). 



Loi de dispari- 



tion de I'activite induite par le radium 

 apres chauffage des corps actives. 

 Paris, C.-R. Acad, sci., 138, 1904, (748- 

 751). 



2 u 



