242 IOWA ACADEMY OF SCIENCE 



1847 



Sacc (Ann., Ser. 3, 21, 119-126). Atomic weight. 



1848 



Schaffgotsch (Journ. pr. Chem., 43. 308-309, also Pogg., 90, 66). 

 Specific gravities. 



1849 



Erdmann and Marchand (Journ. pr. Chem., 55, 202, 1852), 

 Atomic weight. 



1851 



Hittorf (Pogg., 84, 214-220), Melting point of the metallic form, 

 transformation between the allotropic forms. 



Mitscherlich (Berlin Acad., 409-416; or Ann. (3) 46, 301-313), 

 The red crystalline form of selenium and its properties. 



1856 



liegnault (Ann., ser. 3, 46, 288-301), Specific heat, general prop- 

 erties, heat of transition. 



1857 



Oppenhcim (J. pr. Chem., 71, 279-282), Separation from 

 tellurium. 



Botger (J. pr. Chem., 71, 512), Decomposition of selenide so- 

 lutions. 



1858 



Bettendorf and Wiillner (Pogg. Ann., 138, 26), Specific heats 

 of allotropic modifications. 



Mattheissen, (Pogg. Ann., 103, 412), The electromotive force of 

 elements. 



1859 



Dumas (Ann. d. Phys., (3) 55, 186-187), Atomic weight. 



Deville and Troost (Compt. Rend., 56, 891), Vapor density. 



1860 

 Uelsnimm (Ann. d. Phys., 116, 122), Various compounds. 



1863 



Deville and Troost (Compt. Rend., 56, 891), Vapor density. 

 Werther (Journ. pr. Chem., 88, 180-181), Spectrum. 



