Optical Properties. 



1042 



7305 



Boltwood, B. B. 44570. Kadio-activity 

 of tlie salts of radium. 44571. 44574: 

 Radio-activity of thoi-iiim minerals and 

 salts. 44575 : New radio-active ele- 

 ment [Ionium]. 



Camerom & Ramsay, Sir Wm. Pro- 

 perties of ]-adiuni emanation. J.C., 91, 

 (aSCti). Action on solutions containing 

 'copjjer, and lead, and on water. J.C, 

 91, (15!).3). 



Dadourian. 45348. Ifadio-activity of 

 thorium. 



Eve. 45972. Measurement of radium 

 in minerals by the 7-radiatiou. 45'J73 : 

 Relative activity of radium and thorium, 

 measured by the gamma-radiation. 



Hammer. 4707U. Radium and 

 other radioactive substances with a con- 

 sideration of phosjihorescent and fluor- 

 escent substances. 



Kelvin, Lord. 48059. Attempt to 

 explain the radioactivity of radium. 



Lerch. Th X und die induzierte 

 Thoraktivitat. M., 26, (899). 



Lorent. 49120. Kongress fiir Radio- 

 logic und louisation in L.iittich. 



Mache. Radioaktivitiit der Gasteiner 

 Thermen. M., 26, (349J. 



u. Meyer. Radioaktivitiit 



der Quellen der bolimischen Biider- 

 gruppe Karlsljad, ilarienbad, Teplitz- 

 Sclionau-Dux, Franzensbad imd St. 

 Joachimsthal. M., 26, (590). Radio- 

 aktivitiit einiger Quellen der siidlichen 

 Wiener Thermenliuie. M., 26, (891). 



McCoy, H. N. Radioactivity as an 

 atomic property. Am. Soc, 27, (391). 



& Ross. 4927(3. Rela- 

 tion between radio-activity and com230- 

 sition of thorium compounds. 



McLennan. 49301. Radioactivity of 

 lead and other metals. 



Nasini, Anderlini e Levi. 50017. 

 Radioattivita dei sotfioni boraciferi della 

 Toscana e la quantita di emanazione 

 in essi contenuta. 



Fadoa. 50310. Pretesa radioattivita 

 dell'acqua ossigeuata. 



PoM, R. 50058. Lichtemission von 

 Gasen von radio-aktiven Substanzen. 



Ramsay, Sir W. Chemical action of 

 the radium emanation. Action on 

 distilled water. J.C, 91, (931). 



Righi. (IJadioaktivitiit.) Leipzig, 

 1905. 



Rutherford. 51403. Velocity and 

 energy of the o particles from radio- 

 active substances. 51404 : Protluction 

 and origin of radium. 



Radioaktivitiit. P>erlin, 



1907. 



Radioactive transforma- 



Xew York, 190G. 



& Boltwood, B. B. 51408. 



Relative jsroportion of radium and 

 uranium in radio-active minerals. 



Schaefer. 51530. Elektronentheorie 

 und Radioaktivitiit. 



Schlundt. 51002. Electroscopic 

 determination of the radium present in 

 some " tufa " deposits from Hot SiJrings, 

 Ark. 



Schott. 51772. Explanation of the 

 radioactivity of radium. 



Soddy. 52085. Radioactivity. 



Strauss. 52332. Radioaktivitiit der 

 Minei'alwiisser. 



Zempl^n. 53603. Strahlungsenergie 

 des Radiums. (Ungar.) 530)04: Strali- 

 lungsermiiduug der iletalle. (Unga- 

 risch.j 



7310 



REFRACTION AND 

 DISPERSION. 



Baumhauer. 440G1. Doppelhrechung 

 und Dispersion bei einigenPIatindoppel- 

 cyaniiren. 



Proctor. 50786. Index of refraction 

 and dispersion with the interferometer. 



Ecfractlou. 



Amar. Refraction dans les gaz com- 

 poses. C.R., 144, (260). Refraction 

 des corps, t.c. (482). 



BruM. 44818. Optische Wirkungen 

 aneinander stossender (konjagierter)un- 

 gesiittigter Atomgruppen. (German 

 and English.) 



Cheneveau. 45116. Proprietes 



optiques des solutions des corps dissous. 



Cuthbertson & Metcalfe. 45378. Re- 

 fractive indices of gaseous potassium, 

 zinc, cadmium, mercury, arsenic, sele- 

 nium, and tellurium. 



Dons. 45652. Refraktion der Fette 

 und Fettsiiuren. 



1 



