- 96 - 



Thymol. The tests correspond to those of the German Pharmacopoeia. 



Turpentine Oil, crude (01. terebinthinae crudum). Colourless 

 or yellowish; d 15 o 0,860 to 0,875; boiling point 150 to 162 ; soluble 

 in 8 to 10 parts 80 per cent, alcohol 1 ); when exposed to the atmo- 

 sphere the oil becomes viscid, and acquires a yellow colour and at 

 the same time an acid reaction; a mixture of equal volumes oil of 

 turpentine and aniline should remain clear. 



1 ) Oil of turpentine is much more difficult to dissolve in 80 per cent, alcohol; 

 the above data probably refer to 90 per cent, alcohol, of which usually 6 volumes 

 already suffice; only old resinified oils are more readily soluble. 



Turpentine Oil, pure (01 terebinthinae rectificatum) . Obtained 

 by distillation of French oil of turpentine; colourless; d 15 o 0,855 to 

 0,860*); boiling point 160 02 ); soluble in 12 parts 90 per cent, alcohol; 

 1 drop oil must not impart a red colour to moistened litmus paper; 

 5 grams oil must evaporate without resinous residue. 



*) More correct is : 0,855 to 0,870. 



2 ) Pure oil of turpentine passes chiefly over between 155 and 160 . 



Novelties. 



We are indebted to the kindness of a Japanese firm for a con- 

 signment of an oil which is obtained from the leaves and young twigs 

 of the Japanese cinnamon or cassia bark tree, Cimiamomum Loureirii 

 Nees, and which is called in Japan Oil of Nikkei, The nikkei tree 

 is found in the hottest parts of Japan, viz., in the provinces Tosa and 

 Kii. The oil, obtained in a yield of about o,2°/o> has a bright yellow 

 colour and possesses a pleasant odour, reminding of citral and Ceylon 

 cinnamon oil. The other properties of the oil are as follows: d 15 o 

 0,9005; a D — 8°45 / ; acid number 3,01; ester number 18,6; soluble 

 in 2 to 2,5 and more vol. 70 per cent, alcohol, with opalescence; 

 forms a clear solution with an equal volume and more 80 per cent, 

 alcohol. The oil contains 2j°/ aldehydes, which consist chiefly of 

 citral (melting point of the a-citryl-/3-naphthocinchoninic acid 199 ). 

 On fractionating the non-aldehydic portions, cineol and linalool (d 15 o 

 0,8724; a D — 27 ; n D20° I >46387) were found; of the last-named 

 compound probably at least 4O°/ is present in the oil. 



Contrary to a distillate obtained previously by Shimoyama 1 ) 

 from the root bark of the same tree, which was also considerably 

 heavier than the oil here discussed, the one examined by us contained 

 no cinnamic aldehyde. 



*) Comp. Gildemeister and Hoffmann, "The Volatile Oils", p. 391. 



