MICHIGAN ACADEMY OF SCIENCE. 



Name of cow. 



*Colonia Canary 



Bon Heur La.'fie II 



Colantha Queen II .... " 



College Bell Yekema Sarcastic 



Bonnie May 



Daisv 



Breed. 



Hoist ein. . 

 Holstein . . 

 HdUtein. . 

 Hoktein . . 

 Ouernsey . 

 Jersey.. . . 



Specific 

 gi-avity. 



Total 



solid. 



% 



1.033 



1.036 



11.96 

 11.80 : 

 12.20 i 

 12.17} 



13.45 



Fat. 



% 



Solids 

 not fat. 



% 



Ash. 



% 



Freezing de- 



Refrae- j I"'^'^'""- 



tive No. j 



@20°C. 



Of 



milk. 



41.3 



39.1 



39.9 



40.6 



41 



41.8 



1 



*Two .samples give same freezing point. 



jThe serum is the same liquid as used for refractive index. 



.56 

 .56 

 .56 

 .56 

 .56 

 .56 



Of 



t.795 

 .795 

 .795 

 .795 



Amount of added water. 



Freezing 

 depres.^ion. 



50 per cent .29 



25 per cent , I .42 



10 ixT cent I .51 



5 i)er cent " .53 



2A per cent .54+ 



of the comparative value of different determination.s on a few milks. In the 

 Holsteins. the fat. solids, ash and refractive index vary consideral)ly, while 

 tlae freezing jioint depression remains constant. And although the Jersey 

 and Geurnsey are much higher in solids, fat, ash. etc., the freezing point 

 depression is the same. 



Lansing. Mich., April 15, 1909. 



