— 153 — 



which reproduces precisely the qualities that characterise the odour of 

 freshly-gathered roses, and which makes the reproduction of that odour 

 a thing so greatly desired by the leading perfumers. 



Safrol. Although our newly-made contracts in camphor oil (see 

 page 24) have put an end for some time to come to the scarcity of this 

 important product, a return to the previous low prices is not to be 

 thought of for the present, for in order to secure sufficient quantities 

 of raw material we had to decide promptly at the time of buying. As 

 always, American firms were in the market at full prices, and it is only 

 owing to the unusually close relationship between our buyers and the pro- 

 ducers that we have been able at all to keep our safrol plant going un- 

 interruptedly and to its full extent. We have special reasons on this 

 occasion for reminding our readers of the fact that we are the originators 

 of the safrol industry, and that our plant is unique of its kind in the world. 



As already mentioned under wintergreen oil (p. 142), the Imperial 

 Treasury Department is allowing, on trial, the employment of safrol as 

 a denaturing agent, in the proportion of 200 g. for every 100 kilos gross 

 weight of the oil to be denatured. The Treasury Department has issued 

 the following statement relative to the character of safrol: "a liquid 

 of a penetrating odour, colourless or yellowish; di 5 o 1,105 to 1,107, b. p. 

 approximately 233° (760 mm.)". 



Terpineol, like safrol and wintergreen oil, has recently been admitted 

 on trial by the Treasury Department as a denaturing agent for fatty 

 oils (200 g. for every 100 kilos of the oil). The terpineol to be used for 

 this purpose must answer the following requirements: b. p. 216 to 219°, 

 di 5 o 0,938 to 0,940. We beg to observe with regard to this that the minimum 

 limit of the specific gravity is too high. We have frequently observed 

 the specific gravity of best qualities of terpineol of our own manufacture 

 to be as low as 0,935. 



P. Mayer 1 ) has been induced by the solubility-table of the principal 

 odoriferous bodies, which appeared in our Report April 1909, to examine 

 liquid terpineol with a view of determining its suitability for microscopic 

 work. He has discovered it to be a most useful medium, possessing 

 the following advantages over oil of cloves (or eugenol), the material 

 which is used for the purpose at present: — 



1. Liquid terpineol is colourless and remains so, whereas eugenol soon 

 turns brown. 



2. It has a faint odour, whereas that of clove oil is penetrating. 



*) Zeitschr. f. wissenschaftl. Mikroskop. u. f. mikroskop. Techn. 26 (1909), 523. From a 

 reprint kindly sent to us. 



