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2 contained 6 per cent or more of oil of lemon, and 78 less than 1 per 
cent. No methyl alcohol was found. — Exp. Sta. Rec., v. 17, No. 11, 
p. 1098. 
The committee on adulteration report two samples of extract of 
lemon that contained methyl alcohol as the solvent. One sample was 
found to have been made from terpenes of oil of lemon. — Proc. 
Michigan Pharm. Ass., 1905, p. 78. 
OLEUM LINI. 
Wetterstroem, Theo. D., found linseed oil which contained from 
2 to 100 per cent of mineral and resin oils. — Drug. Circ. & Chem. 
Gaz., 1905, v. 49, p. 312. 
LalYall, Charles H., examined 60 samples of linseed oil. of which 
2 were adulterated. — Proc. Am. Pharm. Ass., 1905, v. 53, p. 187. 
OLEUM MENTHA PIPERIT2E. 
Lyons, A. B., points out that in the assay process for menthol there 
is an inaccuracy in the calculation which would vitiate the result by 
fully 1 per cent. The calculation is so intricate that it is not easy to 
explain it clearly. It would be better merely to state arbitrarily 
that no more than a certain stated quantity of half-normal sulphuric 
acid V. S. should be required to neutralize the excess of alkali. — 
Proc. Am. Pharm. Ass., 1905, v. 53, p. 260. 
Umney and Bennett believe that the intention of the 8 per cent 
ester requirement is to obviate the inclusion of Japanese oil and to 
obtain an oil of as good value as possible. But they add : 
It would appear to have gone very near precluding the use of some of the 
highest grade redistilled American peppermint oils. Certainly it will exclude 
some of the Mitcham and Cambridgeshire oils as normally distilled. — Pharm. 
J., Lond.. 1905, v. 21, p. 147. 
Mitchell. K. J.. tested 12 samples and concludes that oil of pepper- 
mint is generally adulterated, chiefly through removal of part or all 
of the menthol. — Proc. Massachusetts Pharm. Ass., 1905, p. 105. 
Gane, E. H.. found a sample of oil of peppermint with a specific 
gravity of 0.903, rotation — 16°, and not soluble in 10 volumes of 70 
per cent alcohol. The sample contained cedar- wood oil and fixed oil 
to the extent of 10 per cent. — Proc. Am. Pharm. Ass., 1905, v. 53, 
p. 187. 
Henkel, Alice, discusses the several varieties of oil of peppermint, 
the source from which they are derived, the method of their produc- 
tion, the amount produced in 1904, the quantity produced in the 
United States, and the variation in price of the oil during the years 
1873 to 1905, inclusive. — Bull. No. 90, Bur. Plant Ind., U. S. Dept. 
Agric., 1906, p. 28. 
