BODY TISSUES AND FLUIDS 



460 



THE RELATIVE PROPORTIONS OF THE CONSTITUENTS or THE BRAIN OF THE ALBINO RAT 



AT DIFFERENT AGES 



CONSTITUENTS IN PER CENT OF TOTAL SOLIDS 



DISTRIBUTION OF SULPHUR IN PLR CENT OF TOTAL S 



DISTRIBUTION OF PHOSPHORUS IN TERMS OF TOTAL P 



contain one molecule of oleic and one of palmitic acid as the fatty acids. 

 The formula would thus be written : 



II 2 C O OOC 17 H 33 

 H C - COC 16 H 31 

 H 2 C P = O 



HCT" O CHo.CH, 



"\ 



HO 



Cephalin differs from lecithin chiefly in containing as its basic sub- 

 stance arnino-ethyl alcohol instead of cholin. Levene and Rolf have shown 



