92 HOW CROPS GROW. 



CENTESIMAL COMPOSITION OF THE ELEMENTARY FATS. 



Stearin. Palmitin. Olein. 



Carbon, 76.6 75.9 77.4 



Hydrogen, 12.4 12.2 11.8 



Oxygen, 10.0 11.9 10.8 



100.0 100.0 100.0 



Phosphorized fats. The animal brain and spinal cord, 

 and the yolk of the egg, contain a considerable amount of 

 fat which has long been characterized by a small con 

 tent of phosphorus. Yon Bibra found the quantity of 

 phosphorus in this (impure) fat to range from 1.21 to 2.53 

 per cent. Knop ( Vs. St. 1, p. 26) was the first to show that 

 analogous phosphorized fats exist in plants. From the 

 sugar pea he extracted 2.5 per cent of a thick brown oil, 

 which was free from sulphur and nitrogen, but contained 

 1.25 per cent of phosphorus. 



The composition of this oil was as follows : 



Carbon 66.85 



Hydrogen 9.53 



Oxygen 22.38 



Phosphorus 1.25 



100.00 



Topler (Henneber^s Jahresbericht 18591860, p. 164) 

 subsequently examined the oils of a large number of seeds 

 for phosphorus with the subjoined results : 



Source of Per cent of 



fat. phosphorus. 



Lupine 0.29 



Pea 1.17 



Horse bean 0.72 



Vetch 0.50 



Winter lentil 0.39 



Horse-chestnut 0.30 



Chocolate bean none 



Millet &quot; 



Poppy &quot; 



Source of Jfcr cent of 



fat. phosphorus 



Walnut trace 



Olive none 



Wheat 0.25 



Barley 0.28 



Rye 0.31 



Oat 0.44 



Flax non* 



Colza &quot; 



Mustard &quot; 



