- 64 - 
that temperature for 15 minutes. When the liquid has cooled down 
completely, myrosin solution is added, and is left to act for 16 hours 
without heating. Instead of the above method, the powdered seed can 
also be digested for 16 hours at the temperature of the room with 300 cc. 
water, to which 0,5 gm. tartaric acid has been added. In both cases 
the generating flask is connected direct with the suitably - arranged 
receiver, and after digestion, as much as possible is distilled off from 
the generating flask, without reducing the temperature at all. The 
mustard oil distilled over is either oxidised with alkaline permanganate 
solution, and the sulphuric acid thus formed determined, — or the 
oil is examined according to the German Pharmacopoeia IV. Ed. 
Neroli Oil. Jeancard and Satie^) have set themselves the 
task of studying the influence of the weather-conditions on the yield 
and constitution of oil of orange blossoms. The observations extend 
over the first five months of each of the years 1901, 1902 and 1903. 
It is seen from the daily determinations of the relative degree of 
moisture during the day and during the night, the temperature, the 
air-pressure, the cloudiness of the sky, etc., and the simultaneous 
examination of the oil distillates, in what manner the weather affects 
the formation of essential oil. The examination of the oils collected 
during this time deals with the determination of the different constants, 
the specific gravity, optical rotation, solubility, viscosity, the determin- 
ation of the acid number, saponification number and content of free 
alcohols (linalool). The last-named determination cannot be carried 
out with exactitude by the acetylation method, as we have already 
previously shown in the case of lavender oil 2). 
The mean yields of oil from the orange blossoms were 
For further details we must refer to the original work. 
Neroli "Schimmel & Co." In view of the approaching distil- 
lation of orange-blossoms, it may be recommended to those who have 
not yet made a trial, not to send their orders to France without first 
submitting our product to a serious test. It is here no longer a 
question of a preconceived opinion, but of a fact acknowledged by 
a large number of experts of the highest standing, that our neroli 
surpasses the natural distillate in quality and richness. 
The difference in strength is estimated rather too low at 10^0- 
in the year 1901 
1,140 7( 
0,95 
0,96 „ 
0 
1) BuU. Soc. chim. III. 29 (1903), 992. 
2) Report April 1893, 37. 
