CHAPTER XL 



OILS AND FATS — GLYCERIN. 



Particulars of the chemistry of vegetable oils and 

 fats may be obtained from 



Spon's Encyclopaedia, ' Oils and Fatty Substances.' 



Beilstein. Handhuch der organischeR CJiemie, 3rd 

 ed. vol. I. ; Pflanzenfette. 



KoNiG. Ghemie der menschl. Nahrungs- und Genuss- 

 miUel, Berlin, 1889. 



Read : — 



Green. Proc. Roy. Soc. xlviii. (1890). 

 SiGMUND. Sitzh. k Akad. Wien (1890). 

 Muller. Ber. d. d. hot. Ges. viii. (1890). 

 SuROZ. (Abst.) Bot Cent, Beiheft i. (1891). 



Oils and Fats. 



These substances will all be in the benzene or 

 petroleum ether extract — the extract may also contain 

 some volatile oils, terpenes, resins, etc., but except in the 

 case of barks the amount of these is generally incon- 



