52 Scientific Intelligence. 
trobenzoic acid and barium benzoate. The nitrobenzoic acid set free 
in the reaction, together with the benzoic acid also present, was 
dissolved by agitation with chloroform or benzol, in which the 
barium salt is insoluble. In the residue, after the solvent was dis- 
tilled one the presence of nitrobenzoic acid was proved by means 
of sodiu In a qualitative ar ad ire 1°6592 grams pure bar- 
ium maitobedsoite was mixed with the theoretical quantity, 1°1815 
grams, of pure benzoic acid ahd dissolved in an excess of hot 
water. The cold solution was agitated with chloroform, the lat- 
bh removed with a pipette, the solvent distilled off, and the 
salt used. Additional experiments seemed to show that the quan- 
tity of the stronger acid thus set free is dependent on the quan- 
Chem 
tity of the weaker acid present.— Ber. Berl. . Ges., vill, ae 
April, 1875. G. F. 
2. On Iodous Chloride.—BRENKEN has examined, in the Lbs 
tory of Lothar Meyer, the formation and pr operties of iodous 
ahioride, ICl,. It was prepared by passing dry chlorine over dry 
trary to the statements of the text-books, it does not "hiae: even 
in an atmosphere of chlorine ; but even at 25 C. it suffers dissocia- 
tion into chlorine and hypoiodous chloride, which latter it is that 
fuses. Under an atmosphere of increased — the dissociation 
took place at 67°, the constituents reuniting as the tube cooled. 
In a sealed tube, the ne biog, Prarie requires a dertedeiteiis of 86°. 
iodous 
walls of the tube. At a still higher deepal. the ICl, in the 
unopened tube dissociates. Closing the opened tu again, a and 
cooling both “_— the unopened ibe contains the yellow iodous, © 
the opened one the brown red hypoidous chloride ICl, which 
remains for a atte time liquid. Experiments to produce a liquid 
chloride resulted negatively. 
In the following paper, Metikorr gives the results of his at- 
em o determine the vapor density of iodous chloride. He 
concludes that this vapor at the temperature of 77°, and under one 
pepite 2 of ‘pressure, even in presence of an excess of chlorine, 
decomposes completely into hypoiodous Se and ~~ rine. —- 
Ber. Berl. — Ges., viii. 487, 490, April, 1 F. 
3. On the Paraffins of Pennsylvania Pearclows Beads 
under Saliorleiines s direction, has made an examination of the nor- 
mal hexane and heptane from Penn nag Mer petr roleum, to test the 
question of the a of isomers. ormal paraffins were chlo- 
