1384 Screntifie Intelligence. 
500° in merc under 760 mm., absorbs 17 times its ee of 
In a thir cape: Troost and Hautefeuille give has results of 
their Ragin ape of the density of os solidified hydrogen. Re- 
pects ile raham, these co as alloys of metallic 
ing 0°970. This il 0-630 as the density of hydrogenium, a 
remarkably close accordance. The mean is 0°625, a density but a 
— be deduced from the above data, is the paresis rahe 
being 1°6.—C. R., lxxviii, 686, 807, 968, March, April, 1 
G. F. B. 
On a Lactic acid of the Allyl series.—In the hope of reducing 
Sid lordeati acid—obtained by heating chloral-cyan-hydrate with 
hydrochloric aci tO monochlor-lactie acid, and of effecting in 
Sbtiochiowne pat not aie the pens chlorine atoms bei ing re- 
placed wh hydrogen but a molecule of water abstracted in addi- 
, thus 
CH ,CLCHOH.COOC, H, —H,O=CHCI--CH-.-COOC,H;. 
Ethyl “monoehloracrylate is a mobile colorless Pa eer boiling at 
146°, having the odor of the allyl series, hgh irritating the mucous 
surfa aces, ign ed ites barium 9 Sg b ditenives arcing: (FE ex- 
OOH) ; thus differing from lactic acid by H, less. The free acid 
was prepared from the barium salt, but for want of material was 
