Chemistry and Physics. 381 
place equally well in sloahabis ag RtiOn. Since the heat of combi- 
nation of triethylamine i above that of aniline, experiments 
were next tried on its Fh pro But since an aqueous solu- 
tion of triethylamine shows a decided alkaline reaction, it became 
hecessary to use alcohol as the solvent. The salts used were the - 
aleoholic solution of alka bers were obtained which showed 
the complete displacement of the triethylamine by the alkali; 
thus again disproving the law of Be am 
acetate, in alcohol, when titeredl with alkali piney showed 
complete displacement. In titering back, the first drop of Ag fs 
tthollet. Besides the importance of these facts in chemical 
theory, the author has founded upon them a quantitative method 
for the volumetric estimation of the or eae bases referre aS 
: eee a. Gee xvi, 315, hard 
ing to the la Sn,As,, 
thus obtained, is a white metallic mass, brittle with foliated 
clube fusible at a higher temperature than tin 48 difficultly 
Soluble in hydrochloric acid with evolution of H,A he cad- 
ay a menine required three pressings, and gave a ‘br itl metallic 
Yo compound of as high a composition in arsenic, Cd, As 
could ‘a formed by fusion. Copper combines with were under 
pressure only with difficulty. After eight pressings a hom mogene- 
4S metallic mass resulted, brittle and granular, orayish- -white in 
Color. Silver acts similarly, giving a “bluish-gra homogeneous 
Metallic mass. Arsenic itself, when submitted to 6, 500 atmos- 
Pheres, ee a metallic luster and a specific gravity of 4°91, 
Ber. Berl. Chem. Ges. xvi, 324, February, 1881 F 
1872 Critve determined the atomic wei of yttrium to be 5, 
the pure earth hav ing been obtained by the partial decomposition 
