* 
382 J. P. Cooke—Atomie Weight of Antimony. 
ent; one in flat leaves, the other in wavy, semi-cylinders or 
irregular prisms. The latter may be the rhabdite of Reichenbach. 
Both kinds, however, are equally taken into solution by long 
digestion in aqua regia. Specific gravity = 7°65. ~ 
Composition. 
SO eS ie cee 94°98 
PCRE: ooe wee ees EES 4°52 
se ig he. Rete sao aet ee Seen ae 0°07 
Grapniie Soe Ree oes sk 0°10 
99°67 
No sulphur was present. For want of material, no examina- 
tion was made for the metals, often detected in small quantities 
in meteoric irons. 
Charleston, S. C., March 12, 1880. 
Art. LI.—The Atomic Weight of Antimony, Preliminary Notice 
of Additional Experiments ; by JoStAH P. COOKE. 
[From the Proceedings of the American Acad. of Arts and Sei., Mar. 10, 1880.] 
f 
fifteen analyses of five different preparations of the brom! 
* This Journal, III, xv, 41, 107, 1878. 
