48 a EXPERIMENT STATION. [Jan. 



DEPARTMENT OF MICROBIOLOGY. 



CHARLES E. MARSHALL. 



Investigations in the department of microbiology during 

 the past year have been confined to two lines of work, — the 

 canning of food and a study of milk clarification. On account 

 of the w^ar situation the soil investigations were suspended 

 until normal conditions are resumed. 



While we have secured many satisfactory results from our 

 canning investigations, nevertheless the work has been left 

 incomplete because of the changes in our staff due largely 

 to the demands of war service elsewhere. It is our hope that 

 we may resume this work with canning as opportunity and 

 facilities offer. 



One portion of the clarification investigation has been com- 

 pleted and is now issuing in bulletin form. The other portion 

 is still under way. 



The publications of the department for the past year may be 

 listed as follows: — 



"Soy Beans as Human Food." A. llano. Mass. Exp. Sta. Bulletin No. 



182. March, 1918. 

 "A Method for the Counting of Certain Protozoa in the Soil." A. Itano 



and G. B. Ray. Soil Sci., 1918, Vol. V., pp. 303-310. 

 "Clarification of Milk." C. E. Marshall and E. G. Hood. Mass. Exp. 



Sta. Bulletin No. 187, November, 1918. 



The analytical work of the laboratory has been heavy during 

 the past year, and may be cited as follows: — 



Milk samples, 1,095 



Physicians' specimens, ........ 136 



Water specimens, ......... 6 



