34a EXPERIMENT STATION. [Jan. 



CONTROL AND REGULATIVE WORK. 



By State law, the enforcement of four different control or 

 regulative laws is vested in the Experiment Station. These 

 are the fertilizer control, provided for under sections 250 to 2(31 

 of chapter 94 of the Revised Laws of Massachusetts; the feed 

 control, provided for under sections 225 to 235 of the same 

 chapter; the poultry disease elimination, provision for which is 

 found in sections 17 and 21 of chapter 75 of the same laws; 

 and the inspection of dairy glassware and examination of milk 

 testers, provided for in sections 25 to 31 of chapter 94. 



The immediate responsibility for the execution of all of the 

 above laws is vested in the Department of Plant and Animal 

 Chemistry, with the exception of the poultry disease elimination 

 law, for which the Department of Veterinary Science is the 

 controlling agency. Detailed reports of operations under these 

 various control laws follow. 



Fertilizer Control. / 



H. D. Haskins, Chemist in Charge, 

 L. S. Walker, Assistant Chemist, R. W. Swift, Analyst. 



During the season of 1921, 109 manufacturers, importers and 

 dealers have secured certificates for the sale of 548 brands of 

 fertilizer and fertilizing materials and 31 lime compounds. 

 The following statistics have been gathered with reference to 

 the year's inspection: 10,567 tons of fertilizer and fertilizing 

 materials were inspected, necessitating the sampling of 21,859 

 sacks; 199 towns were visited; 1,504 samples, representing 

 556 distinct brands, were drawn from stock found in the pos- 

 session of 546 agents or owners; 302 agents were called upon 

 who had discontinued handling fertilizer; 783 analyses were 

 made. In case of lime compounds, 1,106 tons were inspected, 

 necessitating the sampling of 1,194 sacks; 39 towns were 

 visited; 49 samples, representing 27 distinct brands, were 

 drawn from stock found in the possession of 48 agents or 

 owners; 28 analyses were made. 



The following table shows the number of brands of the 

 different materials which were registered and sam})led, as well 

 as the number of analvses made: — 



