126 INDEX TO THE LITERATURE OF THORIUM. 



1902: 1117. AcKROYD. The Telluric Distribution of the Elements in 

 Relation to their Atomic Weights. 



Brit. Assoc. Adv. Sci., 1902, 581 ; Cliem. News, 1902, 86, 187-18S. 



1902: 1118. Brauner. "On Position of Rare Earths in Mendelejeff' s 

 periodical system of the elements." 



J. Russ. Pliys. Chera. Ges., 1902, 34, 2; Nature, 1902, 66, 66. 

 1902: 1119. McLennan and Burton. Some Experiments on the Elec- 

 trical Conductivity of Atmospheric Air. 



Proc. of the American Physical Soc, 1902, Dec. .31; The Physical 

 Review, 1903, 16, 174, 184-192. 



1902: 1120. McLennan. Induced Radioactivity Excited in Air at the 

 Foot of Waterfalls. 



Proc. of the American Physical Soc, 1902, Dec. 31; The Physical 

 Review, 1903, 16, 173, 238-243. 



1902: U21. Geipel. Krystallographisch-optische Studien an syn- 

 thetisch dargestellten Verbindungen. 



Ztschr. Kryst, 1902, 35, 608-628; Min. Mitthl., 1902, 21, 364 Lit. 



1902: 1122. Derby, On the Occurrence of Monazite in Iron Ore and 

 in Graphite. 



Am. J. Sci., 1902, [4], 13, 211-212; J. Am. Cham. Soc, 1902, 24, in 

 Review Am. Chem. Research, 1902, 8, 205; J. Chem. Soc. Lond., 

 1902, 82, 2, 331. 



1902: 1123. Rutherford and Allen. Excited Radioactivity and 

 Ionization of the Atmosphere. 



Phil. Mag., 1902, [6], 4, 704-723. 



