280 
TERPINI HYDRAS. 
Siedler, P., points out that when terpin hydrate is dried according 
to the directions given in the German Pharmacopoeia it does not 
melt, as required, at 116° C., but melts at 102°. The air dry sub- 
stance melts at 116°, and this should have been stated in the pharma- 
copoeia. — Pharm. Post.. Wien, 1905, v. 38, p. 568. 
Matzel, R.. administered to himself up to 4 grammes of terpin 
hydrate without observing any effect whatsoever. — Semi- Ann. Rep., 
Schimmel & Co., 1905, Oct.-Xov., p. 88. 
THYMOLIS IODIDTJM. 
Cormimboeuf, H., asserts that the commercial samples of thymol 
iodide are variable and may contain from 15 to 45 per cent of iodine. 
He outlines a method for the estimation of the contained iodine, as 
iodide of silver, by mixing the thymol iodide with sodium carbonate, 
heating to burn off the organic matter, dissolving, filtering the re- 
sulting solution, adding an excess of ammonia water and treating 
this solution with silver nitrate. — Ann. de chim. analyt.. 1905, v. 10, 
pp. 453-454. 
Kebler, Lyman F.. reports finding a sample of thymol iodide con- 
taining 5.61 per cent of ash, 9.83 per cent of matter insoluble in 
ether, and 4.44 per cent of matter insoluble in chloroform. — Proc. 
Am. Pharm. Ass.. 1905, v. 53, p. 184. 
The Committee on Drug Market reports that of 139 samples of 
thymol iodide, examined in Chicago, 23 were spurious, 66 were 20 per 
cent pure, 10 were 80 per cent pure, 9 were 90 per cent pure, and 31 
were pure. — Proc. Am. Pharm. Ass., 1905, v. 53, p. 183. 
Waldmann (Apoth. Ztg., v. 19, p. 422) points out that a low- 
priced Swiss thymol iodide was found to contain only 50 per cent of 
dithymol diiodide ; the other 50 per cent consisting of 30 per cent of 
salts soluble in water, calcium chloride and iodide, and 20 per cent 
insoluble matter, chiefly calcium carbonate. Another Swiss speci- 
men contained only 15 per cent of dithymol diiodide and 85 per cent 
of red argillaceous earth. A German specimen was found which 
contained 30 per cent of dithymol diiodide. 13 per cent of water, and 
57 per cent of insoluble added matter. — Year Book of Pharm., Lond.. 
1905, p. 24. 
THYMOL. 
Riedel's Berichte points out that the Ph. Germ.. IV, requires a 
boiling point of from 228° to 230° for thymol, while Beilstein gives 
231.8° as the boiling point for this substance. Experiments conducted 
by Riedel -appear to indicate that the boiling point quoted by Beil- 
stein is more nearly correct and that the figures given by the Ph. 
Germ., IV, are too low. — Riedel’s Berichte, Berlin, 1905, p. 51. 
