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OLEUM AURANTII CORTICIS. 
Schimmel & Co. point out that the color of oil of orange is yellow 
to yellow-brown. The optical rotation — 1-95° at 25° C. calculated 
j for 20° C. is +96°. They have observed as lowest value at 20° C. 
-(-95° 30'. — Semi-Ann. Rep., 1906, Apr.-May, p. 76. 
Heinrich Haensel calls attention to a very good quality of oil of 
orange which is being sent on the market from Spain. The color is 
! somewhat redder and on the whole darker than that of Italian oil, 
but the odor and flavor are very good. At 16° C. the specific gravity 
of the Spanish oil was found to be 0.849 and of the Italian oil 0.848. — 
Half Yearly Reports, Apr., 1906, pp. 21-23. 
Schimmel & Co. have fixed the following values for orange oil in 
place of those given in Gildemeister and Hoffman’s work, “ The Vola- 
tile Oils.” Sweet orange oil has a specific gravity at 15° C. 0.848 to 
0.853, optical rotation at 20°, +95° to +98°, the optical rotation of 
the first 10 per cent of the distillate not or but little lower than the 
optical rotation of the original, oil; residue on evaporation 2 to 4 
per cent. The altered behavior of the oil as compared with that 
formerly observed they attribute to the fact that the selection of 
the fruit and the expression of the oil used to take place with less care 
than at present. — Semi-Ann. Rep., 1906, Oct.-Nov., p. 34. 
Evans Sons, Lescher and Webb, report on the examination of 3 
samples of bitter orange oil ranging in specific gravity from 0.853 
to 0.856, and rotation from -(-86° 42' to +88° 30' ; also on the exami- 
nation of four samples of sweet orange oil ranging in specific gravity 
from 0.849 to 0.853, and in rotation from +92° to -j-96° 6'. — Ana- 
lytical Notes, for 1906, E. L. & W., Lond., 1907, p. 26. 
OLEUM BETULJE. 
Henkel, Alice, mentions Betula lenta L., also known as sweet birch, 
black birch, and cherry birch, as being found from Newfoundland to 
Ontario, south to Florida and Tennessee. — Bui. Bur. Plant Ind., U. S. 
Dept. Agric., 1906, No. 89, p. 15. 
Foster, Harold Day, describes the preparation of oil of birch and 
gives some interesting data regarding the yield, the amount pro- 
duced, and the price obtained for the product. — Pharm. Era., N. Y., 
1906, v. 35, pp. 188, 189. 
Brandel, I. W., reviews some of the recent literature relating to oil 
of birch, and related compounds, — Pharm. Rev., Milwaukee, 1906, 
v. 24, p. 379. 
See Oleum Gaultherise, 
