DEPARTMENT OF CHEMISTRY. 



J. B. LiNDSEY, Chemist. 



INSPECTION OF COMMERCIAL FERTILIZERS FOR 

 THE SEASON OF 1924. 



BY H. D. HASKINS. CHEMIST IN CHARGE. ASSISTED BY L. S. WALKER AND 

 GEORGE B. DALRYMPLE. i 



MANUFACTURERS AND BRANDS. 



During the season of 1924, 80 manufacturers, importers and dealers, includ- 

 ing various subsidiaries of the large companies, secured certificates for the 

 sale of o69 brands of fertilizer and fertilizing materials in Massachusetts. 

 The general character of the fertilizers registered is shown by the following 

 classification: 



Complete fertilizers 360 



Ammoniated superphosphates 7 



Superphosphate and potash 2 



Pulverized manures 15 



Ground bone, tankage and dry ground fish 63 



Chemicals and organic nitrogen compounds 120 



Wood ashes 2 



569 



The sampling agents were unable to secure certain registered brands, com- 

 prising both mixed and unmixed materials, many of which were not sold in 

 the state. In some cases a small tonnage of certain brands of mixed goods 

 was sold in a very limited area and the product had been used when the 

 sampling agent arrived. In other cases (numbering 25 in all), chemicals 

 and crude stock materials had been used in special formulas made on order 

 for the consumer, the latter simply purchasing the unmixed products and 

 paying the manufacturer a stipulated amount for their mixing. The following 

 list of brands comprises the unsampled products: 



Brands of Fertilizer Not Sampled. 



> E. W. Martin assisted in the phosphoric acid laboratory two months, and R. A. Mooney in the 

 nitrogen laboratory three months. 



