530 THE SECRETIONS. 



1.0 c.c. milk, corresponds to 23.43 per cent, of butter. 



If cream is to be tested, only one cubic centimetre is to be 

 added at first r and a half c. c. at a time afterwards. 



Yogel found that about 6 c. c. of pure cow's milk, or 3.7 of 



