282. Scientific Intelligence. 
ol. 
Ethylamine, by a freezing mixture is obtained as a caustic fluid, of 
ammoniacal odor, and boiling at 62° F. Its reactions are very similar 
to those of methylamine, but it does not form a precipitate with chlorid 
| of platinum. It burns with a. bluish flame. 
Valeramine, the new alkalaid is obtained by the action of potash on 
cyanate of amylene (cyanic ether of fousel oil), the latter being pre- 
it redissolves the precipitate of salts of copper with more difficulty 
than the other ammonias; the same may be said of the solution of the 
chlorid of silver. The formula isC,, H,, N. : 
The strong resemblance of these new alkaloids to ammonia has un- 
doubtedly caused their presence to be overlooked in many decompost- 
m 
petinine, C, H,, N, which in all probability is butyramine. We have 
then the following homologous series. 
Ammonia, H,N 
_Methylamine, C,H,N 
Ethylamine, C, He 
Butyramine, C, H,,N (Petinine, Anderson.) 
Valeramine, Coty 
9. On a Copper Amalgam; by Dr. Petrenxorer, (Ann. der 
Chem. u. Pharm., June, 1849, in Chem. Gaz.)—This remarkable com- 
e. Its density in the two conditions is so nearly the same, that if 
ressed into a glass tube while in the soft state, it becomes an air-tight 
stopper when hard. Many useful and less hazardous applications than 
filling teeth may be made of this curious substance. 
Of several modes of preparation, the following appears to be the 
easiest and best. Finely divided copper obtained by precipitation by 
iron, is triturated in a porcelain mortar with protoxyd of mercury, 
