328 Journal of the Asiatic Society of Bengal. [N.S., XV, 1919]. 
ee are the best decolorising eee Mig of them 
are ineffective as deodorising substan 
(2) gl ah to sunlight alone gives progressi ive improv 
colour but the odour remains siractiaelly 
co 
(3) poimchaneed air alone has a progressive decoloris- 
ing effect, but the odour still persists. 
(4) a a to both air og sunlight combined has a 
marked effect the colour of the oil. The 
ost, Alcack not ahaont, is not unpleasant 
(5) nha peal with sulphuric acid reduces the colour 
slightly, but the odour disappears in all the samples. 
(6) Caustic soda acts both as a very good decolorising 
and deodorising agent. The minimum quantity 
oil. 
(7) In all the samples, bleached by different methods, 
the colour more or less comes back on standing for 
iod 
a long period. : 
(8) On warming all the samples, deodorised by different 
_ ods, the odour is perceptible. On cooling, 
er, it disappears 
The experimental work was done by Hashmat Rai. 
ices Laboratory, 
Government College, Lahore, India. 
ON LL LO Fe 
