EXPERIMENT STATION REPORTS. 



261 



department of the Stroll Products Company of Detroit, Michigan. We 

 have been working upon it for six months and considerable data are now 

 available. 



Problem No. 3. To determine the Hydrogen Ion Concentration of 

 New Glassware. This problem is about completed. The data will be 

 available for publication at an early date. 



Problem No. 4. A Study of the Keeping Quality of Ice Cream as De- 

 termined by the Hydrogen Ion Concentration Method. 



Seven samples of fermented honey have been analyzed during the 

 year. An unidentified yeast was found in two samples and bacteria 

 in the other five. 



Ten samples of diseased bee brood were analyzed. Five were diagnosed 

 as American foul brood and five as European foul brood. [F. W. Fa- 

 bian.] 



Research Assistant R. M. Snyder makes the following report on his 

 work : 



Nitrogen fixation studies under Adams project 2c are being continued, 

 and in addition cooperative tests involving various methods of inocula- 

 tion are being undertaken. A report system has been perfected which 

 has resulted in the return of data from the majority of farms on which 

 inoculation is attempted. In this manner inoculation studies may be 

 correlated with field practice. 



In the following table are given the numbers of the various legume 

 cultures sent out during the fiscal year 1919-20, the total being approxi- 

 mately 2000 in excess of any other year. The most significant increases 

 have been in the numbers of alfalfa and soy bean cultures dispensed. 

 The demand for cultures closely reflects the crop practice of the state, 

 and present indications are that the future demand for legume inoculat- 

 ing material will greatly exceed that of the past. 



DISTRIBUTION OF LEGUME CULTURES. 

 July 1, 1919-June 30, 1920. 



* Alf., alfalfa ; S. C, sweet clover ; R. C, red clover ; A. C, alsike clover ; W. C, white 

 clover; P. B., field bean; G. B., garden bean; S. !'>., .soy bean; F. 1'. field pea; G. P., gard- 

 en pea; C. P., cow pea; V., vetch; O, miscellanoous. 



[R. M. Snyder.] 



