396 
using the method being to keep the temperature of the reagents and 
the comparison tubes down to at least 15° C. — J. Am. Chem. Soc., 
1906, v. 28, pp. 1472-1476. 
Heinrich Haensel enumerates the following classes of bodies as 
having been discovered in oil of lemon: (1) Hydrocarbons: pinene, 
limonene, phellandrene, and a 'sesquiterpene. (2) Alcohols: 
geraniol. terpineol, melting at 34° C., and linalool. (3) Esters: 
geranyl acetate, anthranillic acid methyl ester, linalyl acetate. (4) 
Aldehydes: octyl and nonyl aldehydes, citral, and citronellal. (5) 
Ketones: methylheptenone. (6) Lactones: 1. 4 dimethyloxy cou- 
marin. The bearers of the aroma of the oil are more particularly 
contained in classes 2, 3, 4, and 5. — Half-Yearly Rep., Oct., 1906, 
pp. 11-13. 
Brandel, I. IV., reviews some of the literature relating to oil of 
lemon, its preparation, composition, and examination. — Pharm. Rev., 
Milwaukee, 1906, v. 24, pp. 44, 45. 
Caspari, Chas. E., reports one sample examined; contained only 
2 per cent citral. — Proc. Missouri Pharm. Ass., 1906, p. 104. 
Baird, J. W., reports 35 samples examined in 1904, 30 adulter- 
ated. — Proc. Massachusetts Pharm. Ass., 1906. p. 59. 
Blome, W. H., reports that of two samples of oil of lemon one 
contained 1.88 per cent of citral and the other none at all. — Proc. 
Michigan Pharm. Ass., 1906, p. 107. 
Matzel, R., (Arch, internat. de pharmacod. et de therap., 1906, v. 5, 
p. 331) asserts that citral. an ethereal oil with an open chain has, on 
inhalation, a paralysant action. — Abstr. Biochem. Centralbl., Leipz., 
1906-7, v. 5, p. 138. 
OLEUM LINI. 
Thaysen, H., discusses the congealing point and the specific grav- 
ity of linseed oil. He concludes that the congealing point, —20° C., 
given by most pharmacopoeias is too low and should be changed to 
— 16° C. He also calls attention to the remarkable specific gravity 
required in the U. S. P. VIII, 0.925 to 0.935 at 25° C., which is 
lower than the requirements of other pharmacopoeias at 15° C., as a 
linseed oil with a specific gravity of 0.9313 at 15° C. showed a specific 
gravity of 0.9274 at 25° C. A sample of linseed oil made by cold 
compression from select linseed had a specific gravity of 0.9323 at 
15° C. and congealed at — 17° C. — Ber. d. pharm. Gesellsch., Berl., 
1906, v. 16, pp. 277-279. 
Thoms and Fencller present a study of linseed oil with particular 
reference to the unsaponifiable matter. — Chem. Ztg., Cothen, 1906, 
v. 30, p. 832. 
An editorial reproduces the high and low quotations for linseed 
oil that have been quoted during the several months of the years 
