221 
Schimmel & Co. illustrate and describe the manufacture of oil of 
lavender as conducted in the south of France. They discuss some of 
the adulterants used, and enumerate the constants found. — Ibid., 
Oct.-Nov., pp. 40-42. 
An unsigned article describes a lavender farm at Broadstone in 
Dorset, England. — Brit. & Col. Drug., Lond., 1905, v. 48, p. 165. 
OLEUM LIMONIS. 
Umney and Bennett point out that the original figure for optical 
rotation of oil of lemon (-(-60°) appeared to be a little high, and 
that a maximum of +64° might have been added. They also point 
out that — 
While Sadtler’s method for the determination of citral is perhaps the most 
satisfactory of published processes, it still leaves something to be desired. In 
the titration the end reaction is not sharp, and it is only likely to give good 
results in experienced hands. The quantity of sodium sulphite solution seems 
insufficient, as better results are obtained with double the quantity or the 
equivalent of a stronger solution. Our experiences with this process show from 
3.8 to 4.4 per cent as normal limits for pure oil of lemon. Onr experiences 
with this process show from 3.8 to 4.4 per cent as normal limits for pure oil 
of lemon. — Pharm. J., Lond., 1905, v. 21, p. 146. 
Schimmel & Co. discuss the properties of terpeneless oil of lemon 
and enumerate the constants found ; they also present some observa- 
tions on the aldehyde determination of oil of lemon. — Semi- Ann. 
Rep., Schimmel & Co., 1905, Apr.-May, pp. 32-36. 
Schimmel & Co. discuss the economic problems prevailing in con- 
nection with the production of oil of lemon. They also record the 
constants of an oil of lemon made in California. — Ibid., Oct.-Nov., 
p. 27. 
Berte, E., presents an indirect process for the determination of 
the aldehyde content of essential oil of lemon. — Ibid., Apr.-May, 
p. 35, and Oct.-Nov., pp. 29-30; also abstr. in Pharm. Ztg., Berlin, 
1905, v. 50, p. 672. 
Romeo, G., presents a monograph in which he describes a newly 
devised method for the quantitative estimation of citral, which is 
based on the fact that citral reacts with a solution of neutral and 
acid sodium sulphite, with formation of sodium citraltrihydrotrisul- 
phonate, according to the equations given. The method appears to 
be similar to the determination of aldehydes and ketones as recom- 
mended by Sadtler. — Sem-Ann. Rep., Schimmel & Co., 1905, Oct.- 
Nov., p. 30. 
McGill, A. (from Lab. Inland Rev. Dept., Canad., Bui. 114, p. 15), 
reports a considerable range in alcohol strength and in lemon oil 
content of commercial extract of lemon. Of 110 samples examined, 
