260 Scientific Intelligence. 
platinate, by acting upon it with an excess of bromine and evaporating 
in the product in vacuo, by chromic and nitric acids, ete. According 
#to M. Gerhardt the reaction will be as follows C,H,,N+2H,0+ 
O,=2C, H, O.-++N Hg. 
Mr. Blyth supposes a simultaneous formation of carbonic acid which 
his formula demands. T. & H. 
2. On the Composition and Metamorphoses of Piperine ; by Tu. 
Werrtuerm, (Comptes Rend. des Trav. de Chim., Oct., 1849, from An- 
nal. der Chem. und Pharm., Ixx, 58.)—The chloro-platinate of pip- 
q 76 Age Ne Oyos Cll, tCl,), and he concludes that crystallized 
e piperine contains 2 e of Aq, and is C, ge Ms O16 J. 
en piperine is mixed with three or four parts of soda-lime and 
e's due is brown and contains a yellowish azotized resin having acid prop- 
erties. If the mixture of piperine and soda-lime is heated to 200° C., 
a te ormula above proposed does not correspond with the law of divis- 
“s ibility, and M. Gerhardt proposes in its place the following formula de- 
; ie uced from the analyses of M. Laurent and his own, and closely ac- 
ne cording with the results obtained for the chloro-platinate by the author. 
a 53 1g N. O,+-Aq, or in the German notation, C,, Hyg N2910 
.% aa ‘He remarks that the decomposition evolving picoline and ammonia, 
or hows pigerie to be a diamid, analogous to th 
« ancel,* in which the two equivalents of alkaloid will be represented by 
“18, On a New Gunpowder ; by M. Aucenpre, (Comptes Rendus, 12 
i a aanteal Gator ) UGENDRE, ( age 
2, Chemical Gaz., May, 1850.)—The proportions giving least residue 
. 
en 
ae 
‘yellow prussiate of potash, - ee’ 
, ’ . . . . - iy 
. 2 oe 
or potash, * . aa ‘oe . 
wdered are carefully mixed, small quan- 
