hoi a few drops of phenalphthatei soluninn are adds na sufficie 
or "Sodium chloride solution until the aie turns red. ‘Then the) su 
acid formed is 46.4— 4.2 = “42. 2 cc., with the fect ele 46.4 — 45, Bee te 
: oil of 100 per cent. yields 42.2 cc. acid, the sample of x per cent. yields Sit) 
M For sake of proof, the author mixed turpentine, oil i a high- bolls ee 
it 
at ordinary temperature. Pinolin (Harzessenz, light rosin 1 oil) yields such to ae 
that it can be at once distinguished from sa ae oil. Yet, in case > the 
the standardization should be carried out not. with 100 per dene terpentine oil NL 
an oil whose percentage is sealant uo) equal to that of the acl 
standing, but, as Tausz observed, this does not come into consideration with or 
turpentine oil. a 
W. Peter and is based on the well- known fact that pinene is oxidice: on. 
mercuric acetate. The oil under examination is boiled for three hours pe 
carbons are removed by steam and their weight is Nena It is in 
recover the hydrocarbons used as adulterants iit For this reason thes 
ahha 
and finally distilling off the hydrocarbon with steam. If from 40 eles fee : pee 
are recovered, the constant of the reaction is 0.2 ce. The pene | on this n 
4 carbon is known. In this case the amount on mercurous ae 
number which was ascertained for numerous hydrocarbons. 
rn 
