SECT. 



I] 



PHYSICO-CHEMICAL SYSTEM 



349 



acid ratio, as shown by expressing the cholesterol in percentage of 

 the fat present, is rather constant, never going below 4 and never 

 rising above 12. This may have some connection with the physical 



Table 44. Data for fat fraction of eggs. 



State of the egg-cell, and will be referred to again (see Section 12-5). 

 The lipoids, expressed as lecithin in per cent, of the fat present, show 

 greater variations, but it is not possible to say at present what the 

 significance of these may be. 



