262 MASS. EXPERIMENT STATION BULLETIN 271 



One luindred and sixty creameries, milk depots and milk inspectors' 

 laboratories were visited in order to check methods and pass upon equip- 

 ment in use. As a result of tiiis inspection, tiiree machines were con- 

 demned outrifiht, major repairs were ordered on five, and minor on twelve. 

 In eiijhteen places new glassware was ordered, and at four, operators were 

 cautioned on account of improperly cleaned glassware. Twenty-seven 

 places were ordered to keep composite samples in better condition. Where 

 it is thought necessary, re-inspections will be made. At the request of 

 interested individuals, special investigations were also made at four differ- 

 ent plants. 



Advanced Registry Testing. (P. H. Smith). Advanced registry testing 

 has been supervised by this department since its beginning in 1902. This 

 work has been carried on for so long that there is no material growth in 

 it from year to year. The M'ork at this time (November 1929) is of 

 practically the same volume as it was a year earlier. There are now on 

 yearly test 602 cows located on 77 different farms. This does not include 

 the herd tests where all animals in each herd are placed on test. Of these 

 there are eighteen, six of which are supervised by men sent out from this 

 office and twelve by cow-test association supervisors. 



Miscellaneous Work. (P. H. Smith, J. W. Kuzmeski, J. B. Zielinski, Jr., 

 A. F. Spelman, G. J. Larsinos). Numerous analyses have been made for 

 residents of the State and other departments of the College. Especial 

 attention is called to the increasing number of dry matter determinations in 

 connection with forage crop experiments. This work has become a real 

 burden upon other work of the department and should it increase material- 

 Is, the employment of an additional assistant during the summer months 

 will be necessary. 



Summarj/ of Miscellaneous Work, 1930 



Materials sent in: 



Milk and cream, butterfat only 388 



Milk, solids and fat 28 



Feeds 66 



For other departments of Experiment Station and College: 



Milk, for butterfat 200 



Dry matter, forage crops 1,324 



Complete fodder analyses 177 



I)rv matter and nitrogen 127 



FERTILIZER CONTROL SERVICE 



H. D. Haskins in Charge 



Fertilizer Inspection. (H. D. Haskins, 11. H. Deiiosc, A. ¥. Spelman, 

 J. B. /iclinski, Jr., and G. J. Larsinos). During the season, 13.3 firms 

 or individuals have registered for sale in Massachusetts 598 brands of 

 mixed fertilizers and unmixed fertilizing materials and 26 brands of agri- 

 cultural lime and gypsum. The nature of these materials, as well as statis- 

 tics with reference to the inspection, is given in the following summary. 



