164 STATE BOARD OF AGRICULTURE. 



IjIST of bulletins 

 Regular: 



291 — Fertilizer Analyses. 

 292 — ^Commercial Feeding Stuffs. 

 Special : 



107 — Diseases of Bees in Michigan. 



108— The Robust Bean. 



109 — Dependable Michigan Crop Varieties. 



110 — Special Report of the Upper Peninsula Experiment Station. 



Ill— Studies in City Milk Distribution. 



112— An Experiment in Imip roving the Milk Supply of a' City 



Milk Plant. 

 113 — ^Sweet Clover. 

 .114 — Spray and Practice Outline. 



115 — Dusting and Spraying Ex])eriments of 1920 and 1921. 

 116 — The Agriculture of the Tapper Peninsula. 

 Technical : 



52 — The Colorimetric Hvrdogen Ion Determination as a Means 



of Studying Biological Changeis in Daily Products. 

 53— A Phonia Root Rot of Celery.' 



51 — Studies in the Diseases of the Productive Organs of Cattle. 

 55 — Tlie Comparative Pathogen icitv of Several Strains of Bac- 

 terium Abortus (Bang). 

 5(3 — Leaf hopper Injury to Potatoes. 



Respectfully submitted, 

 R. S. SHAW, 

 Director of Experiment Station. 

 East Lansing, Michigan, June 30, 1922. 



