231 
can be obtained from shallower and shorter faces. It is believed that 
with the diminution of the severity of the facing operation the ordi- 
nary term of three or four years during which a forest is now worked 
can be greatly increased. — Exp. Sta. Rec., v. 17, p. 979. 
The committee on adulteration reports that three samples of oil of 
turpentine, obtained by the steam distillation of pine wood, were 
examined and found to differ from the ordinary oil of turpentine in 
that they did not give the haemoglobin test. — Proc. Michigan Pharm. 
Ass., 1905, p. 80. 
Schimmel & Co. record experiments made by different observers to 
devise tests for differentiating between turpentine oil and the several 
Avood oils that are being marketed as substitutes for oil of turpen- 
tine. — Semi-Ann. Rep., Schimmel & Co., 1905, Oct.-Nov., pp. 67-71. 
Utz, F., presents a didactic discussion of the limitations which 
should be made in the all too frequently misleading use of the name 
“ oil of turpentine.” — Pharm. Zentralh., 1905, v. 46, p. 681. 
Schimmel & Co. agree with Utz (see reference above) that the 
designation “ oil of turpentine ” might well be reserved for the essen- 
tial oil obtained by distillation with steam from the turpentine of 
various American and French species of Pinus, thus differentiating 
it from the oils obtained by means of superheated steam from wood 
rich in turpentine. — Semi-Ann. Rep., 1905, Oct.-Nov., p. 67. 
Riedel’s Berichte points out that the Ph. Germ., IV, gives the boil- 
ing point of rectified oil of turpentine as from 155° to 162° ; according 
to the experiments recorded by Riedel the boiling point at 760 mm. 
pressure may vary from 158.8° to 161.8° C. — Riedel’s Berichte, 1905, 
p. 50. 
OLEUM THEOBROMATIS. 
Strube, F., reports finding an abnormal oil of theobroma from 
which a fraction was separated that did not congeal even after long 
standing in a cool place. The iodine number and the refractometer 
number were unusually high, the melting point was low, about 12° C., 
the genuine origin of the specimen was unquestioned and indicated 
a jmssible abnormality in the oil itself. — Ztschr. f. offentl. Chem., 
1905, v. 11, p. 215. 
Rakusin (abstract from Chem. Ztg.) has made some investigations 
on the specific gravity of oil of theobroma, and finds that the figures 
given by Dietrich, and adopted in the U. S. P., are more correctly 
true than are the figures quoted by Hager, which Rakusin finds are 
too low. — Deut.-Amer. Apoth. Ztg., N. Y., 1905, v. 26, p. 17. 
Davis and McLellan suggest that, because of the difficulty of com- 
pletely extracting the fat from cacao seeds, the previously made esti- 
mates of the fat content have been low. A number of extractions 
made by the authors showed an average oil content of 54.44 per cent, 
