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label, but the preparation is certified to contain 25 per cent, of citrate of 
quinine. 
No. 4 lias a pale golden colour with a slight greenish tinge. When ex¬ 
posed to the air at a temperature of 60° it lost lustre, and the scales slightly 
adhered to each other. It dissolved readily in water, yielding a fine clear 
yellow solution, which had an acid reaction on test paper, and possessed a 
taste very similar to the preceding but slightly more bitter. When precipi¬ 
tated by ammonia the quantity thrown down was small, and on drying ad¬ 
hered so closely to the papei' that it could not be separated. 
From three analyses of twenty-five grains each I obtained 1'02, 1‘05, and 
1'02, mean l - 03, equal to 4T2 per cent, of quinine, or 6'437 per cent, of ci¬ 
trate of quinine. 
This, when treated with ether, yielded a pale-coloured solution resembling 
the preceding, and left a small quantity of insoluble matter. No name ap¬ 
pears on the label, but the preparation is certified to contain 25 per cent, of 
citrate of quinine. 
No. 5 has a pale golden colour with a slight greenish tinge, much resem¬ 
bling No. 4. When exposed to the air at a temperature of 60° it absorbed 
moisture (but less readily than Nos. 2 or 6) and lost its lustre. It dissolved 
very readily in water, yielding a clear yellow solution which had an acid re¬ 
action on test.paper and possessed a bitter and slightly chalybeate taste. 
The precipitate thrown down by ammonia, when dried, was of rather a light- 
brown colour and of a resinous aspect. 
From three analyses of twenty-five grains each I obtained 1T8, 1T9, and 
1*2, mean 1T9, equal to 4*76 per cent, of quinine, or 7'437 per cent, of ci¬ 
trate of quinine. 
This when digested with ether yielded a brownish-yellow solution, and only a 
small trace of insoluble matter. No name appears on the label, but the pre¬ 
paration is certified to contain 25 per cent, of citrate of quinine. 
No. 6 consisted of rather small golden-coloured scales, having a slight 
greenish tinge. Exposed to the air at a temperature of 60° it lost lustre, 
and became very damp. It dissolved readily in water, yielding a clear yellow 
solution which had an acid reaction upon test paper, and possessed a more 
bitter and rather less chalybeate taste than the preceding. The precipitate 
produced by ammonia had a whitish earthy appearance. From three analyses 
of twenty-five grains each I obtained 1'48, 1’52, and T5, mean 1'5, equal to 
6 per cent, of quinine, or 9'375 per cent, of citrate of quinine. 
This when treated with ether yielded a pale-coloured solution, and left only 
a small quantity of insoluble matter. Certified on the label to contain 25 per 
cent, of citrate of quinine. 
No. 7 had a purer golden-yellow colour than either of the other specimens 
examined. When exposed to the air at a temperature of 60° it did not appear 
to attract any moisture. It dissolved very readily in water, yielding a clear 
yellow solution, which had an acid reaction on test paper and was not very 
bitter to the taste. The precipitate thrown down by ammonia was of a very 
white colour when moist, and light-coloured and sand-like when dry. Expect 
that this will be found to contain cinchonia, but time will not permit me to 
complete the examination for this paper. From three analyses of twenty-five 
grains each I obtained 1*83, 1'86, and 1*84, mean F843, equal to 7'372 per 
cent, of quinine, or 11'518 per cent, of citrate of quinine. 
This, when treated with ether, yielded a pale-yellow solution, which has 
commenced to deposit crystals (quinidine I anticipate) and left a pretty good 
bulk of the precipitate undissolved. Name on the bottle, and the preparation 
certified to contain 25 per cent, of citrate of quinine. 
No. 8 had a golden-yellow colour. When exposed to the air at a tempera- 
