68 DR ANDERSON ON CODEINE, AND 
These analyses correspond with the formula 
Cy Hp, NO, HCl+ Pt Cl, + HO. 
of which the following is the calculated result compared with the mean of expe- 
riment :— 

Mean. Calculation. 
Carbon, : : A 41:91 42:07 Cy, 216- 
Hydrogen, . , = 4:76 4:47 1 23° 
Nitrogen, F : i Spi 2:72 N 14: 
Oxygen, Ei ; : aa 10°94 0, 56° 
Chlorine, J : ; er. 20°61 Cl, 106°5 
Platinum, : : 19:25 19:19 Pt 98:7 
100:00 514-2 
The air-dried salt gave the following results, when dried at 212° :— 
14:845 grains lost 0-770 grains of water, =5:11 per cent. 
14546 ... -0°758 ae =5:20 
This corresponds to three equivalents of water, the calculated result for which 
gives 4:99 per cent. The crystallised salt is therefore represented by the formula 
C,, Hp, NO, HCl+ Pt Cl, +4 HO. 
Codeine forms many other crystallisable salts, none of which, however, have 
been examined. The chromate is easily obtained in fine yellow needles. With 
solution of bichloride of mercury, codeine gives a white precipitate, soluble in 
boiling water and alcohol, and deposited on cooling in stellated groups of crystals. 
With chloride of palladium a yellow precipitate is obtained, which is decomposed 
by boiling, with separation of metallic palladium. Tartrate and hydrocyanate of 
codeine are uncrystallisable. 
Propucts oF DECOMPOSITION OF CODEINE. 
III. Action of Sulphuric Acid. 
Amorphous Codeine.—When codeine is dissolved in an excess of moderately- 
concentrated sulphuric acid, and the mixture digested on the sand-bath, the fluid 
gradually acquires a dark colour, and after some time gives a precipitate with 
carbonate of soda, which the salts of codeine are incapable of doing. The preci- 
pitate so obtained is codeine in a modified or amorphous condition, similar to that 
in which quinine is obtained by a similar treatment with excess of acid. By 
carefully regulating the temperature of the mixture of codeine and sulphuric acid, 
the amorphous codeine may be obtained in a state of purity; but it is neither so 
definite nor so stable a substance as quinoidine. After the action has been pro- 
longed for some time, carbonate of soda is added to the fluid, and the gray preci- 
pitate obtained, collected on a filter, washed with water, dissolved in alcohol, and 
precipitated from the solution by means of water. As thus obtained, it is a gray 
powder, with a more or less green shade, insoluble in water, readily soluble in 
