29 O POISONS : THEIR EFFECTS AND DETECTION. [§ 354 . 
When all the liquid has passed through, wash the remainder of the mor¬ 
phine from the vessel with morphinated water, until the whole has been 
removed. W^ash the crystals with morphinated water until the washings 
are free from colour; allow the filter to drain, and dry it, first at 60 , 
and finally for two hours at 115°. Weigh the crystals in the inner filter, 
counterbalancing by the outer filter. Dissolve 0-2 grm. of the crystals 
in 10 c.c. of N/10 sulphuric acid and titrate with N/10 sodium hydroxide, 
solution of methyl orange being used as indicator. Each c.c. of the acid 
neutralised by the alkaloid corresponds to 0*0285 grm. of pure anhydrous 
morphine. The weight of pure anhydrous morphine obtained, as indi¬ 
cated by the titration, plus 0*051 grm., the average loss of morphine 
during the process, together amount to 0*5 grm., representing in 100 
grms. of the dry powdered opium 10 grms. of morphine, calculated as 
anhydrous. Limit of error, 0*5 grm. in excess or defect. 
§ 354. Medicinal and other Preparations of Opium.— The chief 
mixtures, pills, and other forms, official and non-official, in which opium 
may be met with, are as follows :— 
1. Official. 
Compound Tincture of Camphor, B.P. (Paregoric).—Tincture of 
opium, camphor, benzoic acid, oil of anise, and proof spirit: the morphine 
content should be 5 mgrms. in 10 c.c. 
Ammoniated Tincture of Opium (Scotch paregoric).—Strong solu¬ 
tion of ammonia, rectified spirit, tincture of opium, oil of anise, and 
benzoic acid. Nearly 0*1 grm. of morphine in 100 c.c. 
The Compound Powder of Kino, B.P. 
Opium.5 per cent. 
Cinnamon ....... 20 ,, 
Kino . . . . • • . .75 ,, 
The Compound Powder of Opium, B.P. 
Opium - 
Black pepper .... 
Ginger ..... 
Caraway fruit .... 
Tragacanth .... 
10 per cent. 
15 
30 
42 
3 
Pill of Lead and Opium, B.P. 
Acetate of lead.80 per cent. 
Opium . . . . • • .12 ,, 
Syrup of glucose . . . . . .8 ,, 
Tincture of Opium (Laudanum). — The laudanum of the B.P. is made 
by preparing, first a strong tincture, estimating the morphine content of 
