274 



PROCEEDINGS OF THE AMERICAN ACADEMY 



I. 2{Co,(NH3)i2(S04)3 + ^62(804)3} + 3 aq. 



II. 2{Co2(NH3)x2(S04)3} + 3{Ce(S04),} + 3 aq. 



III. 2{Co2(NH3)io(S04)3 + €62(804)3^ + 9 aq. 



IV. 2{Co2(NH3)io(804)3 +3{Ce(804)2} + 9aq. 



Mr. W. J. Karslake has arrived independently at the same for- 

 mulas, and has calculated the percentages as required by them. 



2450 



100.00 



The analyses are those of Wing. Recent determinations of the 

 molecular masses of the cobaltamines have shown that the chlorides, 



