by nigwine a fetus of 10 Hoe of ut “Cad of oe and 1 
40" Stand « over night and then decanting ite ee 
e AE ae , Amar 
Avahe x ; 4 z 
j fe tt f 
The. aqueous solutions are shaken with a little. Siner and the ethene ‘$0 
together. Then, the aqueous solutions are acidulated with dilute sulphuric 
sulphur dioxide is removed by introducing hydrogen and the vanillin shaken out wit 
ether. The first ethereal solution contains the salicylic acid. One washes it with water 
concentrates strongly and allows to crystallize over sulphuric acids 2 eas 
In order to detect acetanilide in vanillin, he shakes the ethereal solution 
10 per cent. spirits of ammonia until it is no longer coloured yellow. The acetz 
passes over into the ether, traces remaining in the spirits of ammonia. He: acic 1 
shakes with ether, dissolves the residue of pxeeoration in highly diluted spirits 
ammonia and shakes again with Ske BRE ee 
He determines benzoic acid by extracting vanillin in the cold_ with very dilut 
spirits of ammonia, filtrates, evaporates, dissolves in water and treats with ether. The 
presence of benzoic acid in the aqueous liquid can be proved a the aid of ferric : 
chloride. ; ae 
We have, at the time, detected salicylic acid in vanillin by shaking me ethereal - 
solution with a saturated sodium bicarbonate solution’). pn Para re. 
_ sinous t hetarhits formed over scars by Pinus Behpha. p. Pinacee. The cae resin he 
an agreeable aromatic odour, Mei that of vanillin and, Perhaney: at the same time 
resin. The vanillin was contained in the aqueous extract of the resin and its presen: 
was proved by the red colour produced with phloroglucin and hydrochloric acid. 
By the way, vanillin has been found repeatedly in various resins. 
y ~ 
1) Giorn. Farm. Chim. 66 (1917), 121; Chem. Zentralbl. 1917, Il. 495. — #*) Report eee 59. 
5) Monatsh. f. Chem. 38 (1917), 462. ( Pe Ni 
