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BRITISH PHARMACEUTICAL CONFERENCE. 
specimens, this separated readily, and, when dried, had a lightish-brown colour 
and resinous appearance. 
From two analyses of twenty-five grains each I obtained 0 95, 0‘99, mean 
0*97, equal to 3 - 88 per cent, of quinine or 6-062 per cent, of its citrate. This 
was soluble in ether, yielding a pale-coloured solution. 
No. 26. This occurred in small scales of a darkish olive-brown colour, which 
were somewhat coherent. When exposed to a temperature of 60° it remained 
unaltered. It dissolved more readily in water than No. 31, yielding a dark olive- 
brown solution, with a somewhat reddish tinge, and pretty clear, and having 
a moderately bitter, non-chalybeate taste and an acid reaction on test paper. 
From two analyses of twenty-five grains each I obtained 1'39, 1-36, mean 
1- 375, equal to 5 - 5 per cent, of quinine or 8 - 59 per cent, of its citrate. The 
dried quinine was of a dark colour, of a resinous appearance, and nearly all 
dissolved in ether, yielding a somewhat turbid solution of a pale yellow colour. 
No. 27. Consisted of small scales having a dull yellowish colour. Exposed 
to the air at a temperature of 60° it did not absorb moisture. It dissolved 
readily in water, yielding a golden-green solution, but having rather less of 
the greenish tinge than No. 25, and forming a slight deposit. This solution 
had a non-chalybeate taste, and was more bitter than either of the preced¬ 
ing ; it had an acid reaction on test paper. 
From two analyses of twenty-five grains each I obtained 1-97, T95, mean 
T96, equal to 7"84 per cent, of quinine or 12*25 per cent, of its citrate. The 
dried quinine was resinous and of a light brown colour, and dissolved almost 
entirely in ether, yielding a pale yellow solution. 
No. 28. Occurred in large golden-yellow scales, having rather less lustre than 
those of No. 35, but much resembling them. When exposed to a temperature 
of 60° it was unaltered. It dissolved readily in water, yielding a clear golden- 
yellow solution, having an acid reaction on test paper, and closely resembling 
that of No. 27 in taste. 
From two analyses of twenty-five grains each I obtained 1-98, 2"02, mean 
2- 00, equal to 8 per cent, of quinine or 125 per cent, of its citrate. The dried 
quinine was of a light brown colour and resinous, and was almost entirely dis¬ 
solved in ether, yielding a clear, pale yellow solution. 
No. 29. Was composed of large scales having a bright golden-yellow colour. 
When exposed to the air at a temperature of 60° they were unaltered. It was 
readily soluble in water, yielding a golden-yellow solution, a shade darker than 
the preceding, and having an acid reaction on test paper and a non-chalybeate 
and bitter taste. 
From two analyses of twenty-five grains each I obtained 2-12, 2'08, mean 
2*1, equal to 8-4 per cent, of quinine or 13T25 per cent, of its citrate. The 
dried quinine was of a light brown colour and resinous, and dissolved in ether, 
yielding a pale yellow solution. 
No. 30. Occurred in large scales of a dark golden-yellow colour. When ex¬ 
posed to the atmosphere at a temperature of 60° it was unaffected. It readily 
dissolved in water, forming a clear golden-yellow solution, which had an acid 
reaction on test-paper and a non-chalybeate and bitter taste. 
From two analyses of twenty-five grains each I obtained 2'39, 2"4, mean 
2-395, equal to 9-58 per cent, of quinine or 14-968 per cent, of its citrate. The 
dried quinine was light-brown coloured and resinous, and nearly all dissolved 
in ether, forming a pale yellow-coloured solution. 
No. 31. Consisted of medium-sized scales of a yellowish-brown colour. When 
exposed to the air at a temperature of 60° it underwent no change. Was not 
so readily soluble in water as Nos. 26 and 27, but it resembled them in colour 
and was slightly turbid. The solution had a strongly bitter, non-chalybeate 
taste and an acid reaction on test paper. 
