1110 a-PHENETHYLAMINE DEXTROCAMPHORSULPEONATE, LIFVO-a-PHENETHTLAMI NE WaS isolated by LOVkn (Bey., 1896, 29, 2313) in an impure state by fractionally crystallising the acid tartrates of the externally compensated base. I n the hope of finding a method of obtaining the pure active bases in quantity, we mixed the inactive base with the corresponding weight of Reychler's dex trocarnphor- sulphonic acid in hot acetone solation. On cooling, a crystalline salt separated and was purified by crystallisstion from acetone. Dext~~okt!vo-a-p?ie?tet~!/ln~t~iize L ) e . i : t ? . o c c c ) ) ~ ~ ~ ~ o 3 ' 8 ~ ~ ~ ~ ~ 0 3 2 ~ ~ t e , C,IX,* UH( CH,) *NH,,C,,H,,O*XO,,II. The salt is deposited from its cooling acetone solution in minute, melting a t 141 -1 43" ; the following analytical colourless plates results were obtained : 0.1976 gave 0.4436 CO, and 0.1353 H,O.C,,H,,O,NS requires C = 61.19 ; H- 7.64 per cent. An aqueous solution containing 0.5079 gram in 25.1 C.C. at 19' gave a,+0*5iI0 in IL 200 mm. tube, whence [all,+ 1 4 . 6 O and [MI,, + 6 1 .Tio. Since Pope and Peachey linve shown (this vol., p. 1086) that the molecular rotatory power of anirnonium dextrocamphor- sulphonate is [ IM ID + 51*7", it is evident that the salt now described belongs to the class of '' partially racemic " substances discovered by Ladenburg (Bey., 1S9S, 31, 634). The salt is very soluble in water, alcohol, or acetone, and on spontaneous evaporation the solutions become gummy and do not yield good crystals. The crystals deposited from hot acetone solutions are minute, rectangular plates having their corners replaced.They show straight extinction and the acute bisectrix of positive double refraction emerges perpendicularly throngh the large face of the plate; the optic axial angle is fairly large. After melting on a microscope slide, the liquid solidifies with great reluctance, depositing plates crystallographically identical with those obtained from the acetone solution. Inuctive Q- Phenet?~yZa?ni,~ae I'latinochloricle, (CHPhMe*NH,),,H,PtCl,, -Both the dextrocamphorsulphonate and the hydrochloride Qf the baqe C! = 61-22 ; I€ = 7.60." NON-RACEMIC " AND " RACEMIC " LIQUIDS. 111 I yield the same platinochloride ; this salt is very soluble in acetone and orystallises from a mixture of aoetone and ethylic acetate in golden- yellow scales melting at 213-214". The following analytical results were obtained : 0,1623 gave 0.04S8 Pt. Pt =li 30.06. C,,H,,NC16Pt requires Pt = 29-96 per cent. GOLDSMITIIS' INSTITUTE, NlCW CRUSS.