364 Proceedings of Royal Society of Edinburgh. [sess. 
been driven off, the residue was treated with hydrochloric acid in 
excess, which rapidly caused crystallisation of the hydrochlorate. 
The crystals were pressed, and purified by recrystallisation from 
water and from alcohol. So obtained, the salt was nearly free from 
colour, and when examined under the microscope the crystals 
appeared to be all of the same form. 
Chloroplatinate prepared in usual manner, dried in air-bath at 
120° C. 0*28 grm. gave ‘0522 grm. platinum, which is =18 '64 per 
cent. 
(C 19 H 23 N0 3 .HC1) 2 , PtCl 4 , H 2 0 = 18'65 per cent. Platinum. 
A quantity of the hydrochlorate was purified by recrystallisation, 
and a chloroplatinate prepared from the purified crystals. 
•309 grm. (dried at 100° C.) ignited, gave *0576 grm. Platinum, 
which is = 18*64 per cent. 
As from these results the chloroplatinate appeared to contain a 
molecule of water, although dried at 120°, a portion of the compound 
was exposed in the air-bath at gradually increasing temperatures, 
but there was no distinct loss of weight till 160° was reached, at 
which temperature there was also distinct evidence of decompo- 
sition. 
Several determinations of the chlorine were made by precipi- 
tation with nitrate of silver in the usual way. 
(a.) *469 of the hydrochloride (dry in water-bath) gave '189 
AgCl = '0467 Cl, which is = 9*95 per cent. 
( b .) -2485 grm. gave '099 AgCl = *02449 grm. Cl = 9'85 per cent. 
(c.) *595 grm. gave -2403 AgCl= '05944 Cl = 9'98 per cent. 
(i d .) '4515 grm. dry at 140°, gave T822 grm.; AgCl='0450 grm. 
Cl= 9*98 per cent. 
Mean of the four determinations = 9 '9 4. 
(C 19 H 23 N0 3 .HC1) 2 .H 2 0 = 9 '90 per cent. Cl. 
The alkaloid itself was obtained by dissolving the hydrochloride 
in water, and adding slight excess of ammonia. A viscous precipi- 
tate separated, but after standing some hours, with occasional 
stirring, it became a mass of small prismatic crystals. These were 
washed with cold water and dried in the air. The air-dry sub- 
stance lost no weight in the water-bath or at 120° C. When the 
temperature was raised to near 135°, the substance fused and dark- 
