Chemistry and Physics. 429 
A-cymene-sulphate, as an indistinctly crystalline mass, easil 
soluble in absolute alcohol. -cymene-sulphamide prepared from 
this salt, fuses at 106°-108° ©. e cymene prepared from the 
a-sulpho-salt is a colorless highly refractive liquid of agreeable 
°=175° oxidation it gives an acid of high 
the sulphamide, Hence the author is inclined to regard this 
cymene, at least provisionally, as meta-isopropyltoluene.— Ber. 
Berl. Chem. Ges., xiii, 1157, June, 188v. G. F. B. 
reparation of normal Ethyl sulphate.—V W.mERs 
slowly with twice its volume of concentrated sulphuric acid, in as 
good a vacuum as possible. The yield is 25 to 30 grams. Two 
layers of liquid appear in the receiver, the lower of which is the 
ether. It is rectified in vacuo, and boils under a pressure of 5 
mm, at 2°5° ©. It crystallizes at —24°5°, and alkalies convert 
it at once into sulphethylate.-— Bull. Soc. Ch., I, xxxiv, 25, July, 
1880, G. F. B. 
_ 8. On Homatropine.—Atropine, as is well known, breaks up 
Into tropic acid and tropine. LapenBuRG succeeded in reversing 
the process and in producing atropine from tropic acid and tropine. 
This led him to the synthesis of an entirely new class of alkaloids, 
which he called tropeines, produced by the action of acids upon 
tropine in presence of hydrochloric acid, The tropeine of mandelic 
or oxytoluylic acid, which he calls oxytoluyltropeine or homatro- 
pine, while possessing equal mydriatic power with atropine, yet 
passes off much more rapidly, in 12 to 24 hours. Merck has 
obtained it crystallized from solution in absolute ether. It fuses 
at 95°5° to 98-5°, and has the formula C,,H,, NO,.— Ber. Berl. Chem. 
Ges., xiii, 106, 1081, 1340, July, 1880. G F. B 
7. On Carbonyl Hemoglobin.—W uxt and Von Anrep have 
emoglobin toward oxidizing agents as a means of detecting the 
becoming yellowish-green in color. Blood containing CO remains 
red, becomes turbid and shows no bands. The quantity of the 
oxidizing agent required to produce the bands increases with the 
