256 IOWA ACADEMY OF SCIENCE 



Stebbins and Brown (Astro. Phys. Journ., 26, pp. 336-340), A 

 determination of the moon's light with a selenium photo- 

 meter. 



Wertheim-Salomonson (Verh. d. Roentgenes, 3, 96-106), The 

 action of X rays on selenium. 



1908. 



Athanasiadias (Ann. d. Phys., (4) 25, 92; and vol. 27, 890), 

 The relation between illumination and conductivity. 



Athanasiadias (Ann. d. Phys., (4) 27, pp. 890-891), The action 

 of X rays on selenium. 



Brown and Stebbins (Phys. Rev., 26, pp. 273-293), Studies on 

 electrical resistance of selenium. 



Grippenberg (Phys. Zeits., 9, 519), The use of selenium vapor 

 in coating selenium cells. 



Korn (Natw. Bauds. Braunschweig., 23, 521), New results with 

 telautagraph. 



Kohl (Zts. f. Phys. Chem. Unterr., 21, 142), Demonstration 

 apparatus for Korn's distance photography. 



Merritt (Phys. Rev., 27, 367), The recovery of selenium from 

 light. 



Minehin (Proc. Roy. Soc, A. 81, pp. 9-21), Seleno-aluminum 

 bridges. 



Minehin (Nature, 77, p. 198 and 222: also Elect. Rev.. 52, 172), 

 The action of mercury vapor on selenium. 



Ries, Chr. (Phys. Zeits., 9, 164), Light sensitiveness of selenium. 



Ries (Phys. Zeits., 9, 228). Properties of selenium. 



Ries (Phys. Zeits., 9, 569), Influence of moisture on the elec- 

 trical properties of selenium. 



Ries, Chr. (Monograph published by the "Mechaniker"), The 

 electrical properties of selenium and its applications. 



Stebbins (Astro. Phys. Journ., 27, 183), The color sensibility 

 of different selenium cells. 



Zemplin (Potf. Ternt. Kozl., Budapest, 40, 68-70), Action of 

 light on electrical behavior of selenium. 



