- 67 - 



as follows: i to 2 grams oil are dissolved in 100 cc. glacial acetic 

 acid, or better chloroform 1 ), 5 g. potassium bromide and 20 cc. fuming 

 hydrochloric acid are added, and next enough of a titrated solution 

 of potassium bromate to cause a permanent bromine reaction. The 

 bromine numbers found by Vaubel agree well with the iodine numbers 

 found by Worst all. On the other hand, Holde considers the specific 

 gravity of the turpentine oils, and Herzfeld their behaviour towards 

 concentrated and fuming sulphuric acid, as better standards for valueing 

 than the bromine number. 



Wintergreen Oil. The last shipments made by our New York 

 branch have still been invoiced at the old price, but for future consign- 

 ments the prospects are higher prices. As the present value is ab- 

 normally low, the timely purchase of supplies should not be delayed. 



Siro Grimaldi 2 ) has detected salicylic acid (which most prob- 

 ably originates from the action of a ferment on a glucoside as 

 methyl ester of salicylic acid) in various parts of plants, as for example 

 in the agriots which in each kilogr. fruit contains 0,1 to at most 0,45 to 

 0,5 mg. salicylic acid; further in the berries of Vitis lafo'usca Linn, and 

 in those of Rubus idaeus Linn., especially in the raspberries of Monte 

 Amiata. The author detected this acid in the benzene or ether extract 

 of the parts of the plant in question, by means of the ferric chloride 

 reaction, and by conversion of the acid into ammonium picrate when sub- 

 mitted to the action of aqueous nitric acid and subsequently of ammonia. 



Wormwood Oil. Over-production in the South of France and 

 Algeria has depressed the prices as never before, whilst there is an 

 excellent selection of qualities. The competition of the American oil 

 has been paralysed by the abnormal state of the price. 



Ylang*Ylang Oil. Although the consignments of the "Sartorius" 

 brand were again more abundant last year, the demand could only 

 be met with great difficulty. According to the most recent reports 

 from Manila, dating from the end of January, there was then a scar- 

 city of blossoms, and the distillation had been interrupted in con- 

 sequence; but this is now probably past, as a shipment has meanwhile 

 been advised by cable. Our friends in Manila make every possible 

 effort to increase the production to such an extent, that the con- 

 sumption can always be fully satisfied. According to official consular 

 reports, the value of ylang-ylang oil exported from Manila in the 

 year 1904/1905 amounted to 100349 dollars, i. e. about 300 dollars 

 less than in the two preceding years. 



2 ) Comp. also Pharm. Ztg. 51 (1906), 257. 



2 ) Staz. sperim. agrar. ital. 38 (1905), 28 to 21. Accord, to Chem. Centralbl. 

 1905, II., 1503. 



