Chemistry and Physics. 141 
hours, and the yield from 1°5 kilograms camphor is from 725 to 
805 grams crystallized camphoric acid.—Ber. Berl. Chem. Ges., 
iv, 570. July, 1871. Ga FB 
; the Synthesis of Ozxaluric acid.—By the action of 
ethyloxyoxalyl chloride upon urea, Henry has succeeded in form- 
i ric acid, 
? 
The reaction takes place according to the 
Cl owe Ee 
0,0, i 00,1, + | Hn = HN 1 6,0,-00,H, +H. 
in ky 
needles, which are tasteless and anhydrous, slightly soluble in 
co re so in hot water, easily soluble in acids, alkalies, and 
ammonia. Heated to 160° to 170° it melts, evolving oxamethane 
and leaving cyanuric acid. Boiling with water decomposes it, 
yielding oxaluric acid. Heated with alcoholic ammonia to 100° it 
yields oxaluramide.— Ber. Berl. Chem. Ges., iv, 644, July, 1871. 
G 
. FB. 
5. On the Coloring matter of Cochineal—LiEBerMaNnn and 
water containing nitric acid, gave the latter substance pure, in 
large silvery plates. This acid, when heated in sealed tubes with 
0 e cresol of coal tar, fusing a ,» and yielding a 
oe salt which crystallizes from water in yellow needles. 
he nitrococcusic acid is therefore one of the isomeric trini- 
ave all been prepared and examined. s 
nitrococeusie acid to cresol, it is clear that the coloring matter of 
To obtain that part of the carmine molecule which yielde 
nitrococcusie acid, free from the action of the nitric acid, this car- 
mine was warmed with concentrated sulphuric acid. At 120° the 
of CO, and SO,. After prolonged heating to 140° or 150°, the 
whole was poured into water, when the new coloring matter was 
‘ 
