397 
1903 to 1906, inclusive. — Oil, Paint and Drug. Rep., 1906, v. 70, 
Nov. 26, p. 7. 
Loomis, Henry M., presents some notes regarding adulteration of 
linseed oil and outlines several tests for the detection of mineral 
oils. — Chem. Eng., 1906, Phila., 1907, v. 5, pp. 205-206. 
Thomson and Dunlop have determined the iodine value of linseed 
oil and of related oils by AYijs’ method and record their results 
with this and other constants of the several oils. — Analyst, Lond., 
1906, v. 31, p. 282. 
The Ph. Brit. Committee of Reference in Pharmacy suggests that 
the monograph for linseed oil be revised, introducing iodine and 
saponification values. — Chem. & Drug., Lond., 1906, v. 69, p. 864. 
Smith, Kline & French Co. report the results of the examination 
of 10 samples of linseed oil. — Lab. Rep., S. K. & F., 1906, p. 18. 
OLEUM MENTHJE PIPERITiE. 
Henkel, Alice, discusses the production of oil of peppermint, the 
source, and the countries where grown. — Western Druggist, 1906, 
v. 28, pp. 130-134. 
Schimmel & Co. discuss the original requirements for oil of pep- 
permint at some length and point out that the Michigan oil rotates 
between — 18° and — 29°. They also assert that oil of peppermint 
is not always colorless, but sometimes is distinctly yellowish or green- 
ish yellow. — Semi-Ann. Rep., 1906, Apr.-May, p. 75. 
They point out that the specific gravity for oil of peppermint in 
the Ph. Ndl. IV, 0.900 to 0.920, at 15° C., admits both the American 
and English oils. — Ibicl., Oct.-Nov., p. 87. 
Francis, John M., thinks that the requirement that oil of pepper- 
mint shall be a “ colorless liquid ” is wholly unnecessary and adds to 
the expense, if it be intended thereby to exclude the yellowish do- 
mestic oil, which is obtainable in fine quality and at a less price. 
Many Michigan and New York farmers, who produce a limited 
quantity, of very fine oil of peppermint, are not familiar with the 
expedient of washing with water acidulated with tartaric acid, 
which works wonders with the dark oil. This oil improves with 
age for some time, and even the very best when quite fresh has a 
characteristic “ weedy ” odor. — Bull. Pharm., Detroit, 1906, v. 20, 
p. 141. 
See also Proc. Am. Pharm. Ass., 1906, v. 54, p. 449. 
Dane, E. H., points out that the U. S. P. requirement of not less 
than 8 per cent of ester is too rigid and excludes the finest grades of 
oil that contain 4 to 6 per cent. Presumably the object of the test 
is to exclude the Japanese oil, which runs from 3 to 6 per cent, but 
it also excludes the finest Mitcham and Saxony oils. — Ibid., v. 54, 
p. 342. 
