EXPERIMENT STATION BULLETINS. 393 



REFERKNCES. 



(1) Cooleclge, L. H. and Wvant, R. W. The Keepiiio- Quality of Milk 

 as Judged by the Colorimetric Hydrogen-Ion Determination. 

 Journal of Dairy Science, Vol. Ill, No. 2, March 1920. 



(2) Standard Methods for the Bacteriological Examination of Milk. 

 American Public Health Association 1921. 



(3) Weinzirl, John. Detection of Manurial Pollution in Milk by the 

 Anaerobic Spore Test. American Journal of Public Health, Vol. 

 XI, No. 2, February 1921. 



(1) Wyant, Zae N. Journal of Bacteriology, Vol. V, No. 3, March 



1920. 

 (5) Clark Wm. M., and Lubs, H. A. Journal of Bacteriology ii, Nos. 



1, 2, and 3. 1917. 

 (0) Cooledge, L. H. Journal Industrial and Engineering Chemistry, 



Vol. 12, No. 5, p. 499, May 1920. Technical Bulletin No. 52, 



Michigan Agricultural College Experiment Station. 



