ABOUT FRUITS, FLOWERS AND FARMING. 213 



the albumen and mucilage which are found in vegetable 

 oils. The following analysis of hemp-seed, and flax-seed, or 

 as it is called in England lint or linseed, will show the 

 proportions of various ingredients in one hundred parts. 



Hemp-seed. Linseed. 



(Bucholi.) (Leo Meier.) 



Oil, 19.1 11.3 



Husk, etc 88.3 44.4 



Woody fibre and starch, 5.0 1.5 



Sugar, etc 1.6 10.8 



Gum, 9.0 7.1 



Soluble albumen (Casein ?) 24.7 15.1 



Insoluble do 3.7 



Wax and resin, 1.6 8.1 



Loss, 0.7 8.0 



100 100 



The existence of impurities in oil, such as mucilage, albu- 

 men, gum, etc., which increase its value to the painter, dimin- 

 ishes its value for the lamp, since these substances crust or 

 cloy the wick, and prevent a clear flame. All oils may, 

 therefore, the less excellent they are for painting, be regarded 

 as the more valuable for burning. Rape-seed is extensively 

 raised in Europe, chiefly in Flanders, for its oil, and is 

 much used for burning. Ten quarts may be extracted 

 from a bushel of seed. "We append a table represent- 

 ing the richness of various seeds, etc., in oil. 



Oil per ceok 



Linseed (flax) 11 to 22 



Hemp-seed, 14 to 25 



Rape-seed, 40 to 70 



Poppy-seed, 36 to 33 



White mustard-seed, 86 to 48 



Black mustard-seed, 15 



Swedish turnip-seed, 34 



Sun-flower seed, 15 



Walnut kernels 40 to 70 



