F. W. Clarke—Specifie Gravity Determinations. 208 
by dissolving the carbonates of the metals in the respective 
water. e sp. grs. are as follows: | 
Cobalt formate, 2°1986, 22°; 2°1080, 20°-2. 
Nickel “ 2°1547, 20°°2, 
Cobalt acetate, 1°7031, 15°°7; 1°7043, 18°°7. 
Nickel * 1°7448, 15°°7; 1°7346, 17°°2, 
Miss Stallo also prepared, with a view to future description, 
the cobalt and nickel salts of monochloracetic and trichloracetic 
acids. These salts are readily crystallizable, and seem likely 
to be interesting. Cobalt valerate, which Mr. J. L. Davis 
attempted to prepare, was obtained by him only as a red, 
mmy mass, of a very unsatisfactory character. — : 
_ Another series of experiments having a certain theoretical 
Interest, relates to some salts analogous to the sulphovinates. 
e data obtained are as follows: 
Barium methylsulphate, Ba(CH,),(SO,),.2H,O, 2278, 
19°2; and 2-279, 21°-2, determined by Dr. Geppert. 
Barium ethylsulphate, 2-080, 21°-7; 20714, 22°6; Dr. Geppert. 
Barium propylsulphate, 1°839, 20°°5; 1°844, 20°°5 ; Dr. Geppert. 
Barium se 1°778, 21°°2; 1°743, 24°°2; Mr. W. H. 
n. 
ue 
Barium amylsulphate; 1-623, 21°-2; 1°632, 22°; Mr. John Whet- 
stone. 
If now, we calculate the molecular volumes of these salts, we 
Sade find them separated by approximately equal differences. 
Tribute 
M 
ethylsulphate, molec. vol. 176, calc. sp. gr. 2°244. 
Ethylsulphate, “ * te," *. eee 
“  & {R68 
Propylsulphate, “  “ 242, 
Isobutylsulphate, “ oe 
Amy te, 
phat el a 
