146 Scientific Intelligence. 
between 40° and 50°. Reerystallized from alcohol, they appeared 
as brilliant broad needles, fusing at 95°-96°, insoluble in water 
but easily soluble in boiling alcohol, in ether, petroleum naphtha, 
carbon disulphide, ete. On analysis they gave the formula 
C,H,(NO,), which is that of dinitrobutane.—Ber. Berl. Chem. Ges., 
xiv, 1620, July, 1881. G. F. B. 
7. On the reactions of Chinoline.-—The antiseptic and _anti- 
] 
duction into commerce, Donartu has given the following reactions 
of this base, by which its presence may be recognized: (1) Chin- 
ie 3 
Phosphomolybdic aeid (10 parts sodium phosphomolybdate in 
100 water made strongly acid with nitric acid) gives with a chinoline 
solution acidulated with nitric or hydrochlorie acid, a yellowis 
white precipitate easily soluble in ammonia. Delicacy 1: 25000. 
cacy 1:17000. (6) Mercurie chloride (5 parts to 100 water) 
gives a white flocculent precipitate, readily settling, soluble im 
hydrochloric acid, difficultly in acetic aci arated from 
dilute solutions in crystalline needles. Delicacy 1: 5000. (7) 
Potassium-mercuric iodide (5 parts KI, 1-4 parts HgCl, and 100 
amorphous precipitate falls which soon becomes crystalline. 
Delicacy 1:1000. (9) Potassium dichromate, carefully added, 
forms fine dendritic crystals soluble in excess of the reagent.— 
G. F. B 
81. 3. F. B. 
8. On the theory of the Peptones.—Porut has experimentally 
confirmed a theory of the formation of peptones proposed in 1873 
by Eichwald; i. e., that liquid albumen in contact with animal 
