— 128 — 



H. Herissey 1 ) has etablished that in the seeds of Eryobolrya 

 Japonic a, amygdalin is the only glucoside which can be split up by 

 emulsin; the quantities found amounted to 1,0 to 1,1%. 



In a second work Herissey 2 ) reports on the presence of pru- 

 laurasin in Cotoneaster microphylla Wall. The glucoside melted at 

 120 to 122°; « D (in 6,67 per cent, solution) — 52,4°. By means of 

 emulsin it was split up into glucose, prussic acid, and benzylaldehyde, 

 the latter being identified by the phenylhydrazone. 



In the distillation waters of some plants indigenous to Belgium, 

 P. Jitschy 3 ) has found prussic acid, namely in Ranunculus repens and 

 A', arvensis (Ranunculaceae), Gynerium argenteum,Melica altissima, M. nutans, 

 M. uniflora, and M. ciliata (Gramineae). The quantity of prussic acid 

 detected fluctuated between 0,0071 and 0,023 1°/ . 



A. H e b e r t 4 ) found in the upper portions of Viscachera pucara 

 0,02 °/o prussic acid, and an emulsin-like enzyme. 



A new prussic acid glucoside, "vicianin" has been isolated by 

 G. Bertrand 5 ) from the seed of the vetch, Vicia angustifolia Roth. 

 The melting point of the glucoside lies at about 160 ; the prussic 

 acid can be split off by emulsin. 1 kilo seed yields about 0,750 g. 

 prussic acid. 



Hydrocarbons. 



Pinene. W. A. Tilden and F. G. Shepheard 6 ) report on the 

 production and properties of dihydropinylamine (pinocamphylamine). 

 This body forms the principal product of the reduction of nitroso- 

 pinene with sodium and amyl alcohol. The free base is colourless, 

 liquid, and possesses a pinylamine-like odour. It boils at 198 to 199 , 

 and absorbs hydrochloric acid. Wallach 7 ) had already produced 

 pinocamphylamine by the action of zinc and acetic acid on nitroso- 

 pinene and identified it by the carbamide (m. p. 204 ) and the acetyl 

 compound (m. p. 120 ). Tilden and Shepheard, however, found 

 the melting point of the latter at 108 to 1 io°, and for the carbamide the 

 same as Wallach. They also produced the platinum salt, the picrate 

 (m. p. 208 ), the nitrate (m. p. 180 ), the oxalate (m. p. 275 ), and 

 the benzoyl compound (m. p. 144 ). The boiling point determined 

 previously by Smythe 8 ) for pinocampheol, 104 to 105 (pressure 



*) Journ. de Pharm. et Chim. VI. 24 (1906), 350. 



2 ) Ibidem, 537. 



3 ) Ibidem, 355. 



4 ) Bull. Soc. Chim. III. 35 (1906), 919. 



5 ) Compt. rend. 143 (1906), 832. 



6 ) Proceed, chem. Soc. 22 (1906), 23$; Journ. chem. Soc. 89 (1906), 1560. 



7 ) Liebig's Annalen 300 (1898), 266; Report October 1898, 41; Liebig's 

 Annalen 313 (1900), 367. 



®) Smythe, Thesis, Gottingen 1898, 19. 



