Barr “mark, the contents shaken phorouahiy: then let ee dill ‘tor tie 
: filtered through a folded filter and the oil. determined in a 20 ce. | 
af! ft 
50 cc. water, ies 1G; HCI (1: 1) is added and the iui shaken out 
2B. cc. ‘portions of ether. 
a. Pita a) recommends Koberts Caan with Bnigrosiuenel and 
The red coloration produced by this reagent with certain aromatic | 
as claimed by Kobert, a trustworthy test for the presence of the allyl. grou “ 
and safrole, for instance, give the characteristic coloration only after at least s = 
standing at ordinary temperature. On fractional distillation of such oils 
‘Pressure, the first fraction does not st the reaction pau ore a0 
ie, richest in carbon. 
hydrocarbons. The paraffins dissolve most ean in 1 the eae . way aoe 
dioxide which, GaRNtn be to Edeleanu, ‘extracts from mixtures principally the t 
rt. hydrocarbons. 
* method, fail, however, in cases where the amount of nnisabibated huilig 
| great, since then the hydrocarbons dissolve completely in the solvent. 
Inasmuch as the acetic ce pie method might lend ee te eee xan 
ee + 1) Journ. ind. eng. Paenisiry: 10 (1918), 537; Journ. seo ee ‘Be 
BS Chein: Ind., Tokio 21 (1918), 513; Journ. Soc. chem. Industry 37 (1918), A. 71 
& _— 4)+Report October 1899, 24; October 1912, 43. — 5) Koninkl. Ree 
a Natuurkund. Afi 27 (1918), 283. Meetine ‘of Sept. 21, 1918. ah re 
