INSPECTION OF COMMERCIAL FERTILIZERS 



45 



Stone MeaL 



Manufactured by W. N. McCrillis & Co., Boston. 



The analysis given above rei)resents the average composition of three samples 

 drawn at Boston, Chatham and Harwich. The small amounts of lime and mag- 

 nesia that are soluble in 1-1 hydrochloric acid are present chiefly as carbonates 

 and would have a neutralizing effect on sour soils. The lime and magnesia would 

 also be available as plant food in soils deficient in these elements. On the as- 

 sumption that all the plant food found soluble in dilute hydrochloric acid would 

 be effective the first year, a commercial valuation of only 61 cents a ton could 

 be given to the product. \\'hcn sold by the ton, two of the lots cost $35 and $45, 

 respectively; and when sold by the hundred, a charge of $70 per ton was made 

 for the third lot sampled. 



DEFINITIONS AND INTERPRETATIONS REGARDING 

 FERTILIZERS. 



The following definitions and interpretations were adopted as official by vote 

 of the Association of Official Agricultural Chemists at a meeting held in Wash- 

 ington in October. 



The order of terms in mixed fertilizers shall be nitrogen first, phos])horic acid 

 second, and potash third. 



The statement of guarantees of mixed fertilizers shall be given in wliole 

 numbers. 



Acidulated fish tankage, acidulated fish scrap, is the rendered product 

 derived from fish and treated with sulfuric acid. 



^^ hen the name of a material is used as a part of the brand name of 

 a mixed fertilizer, as, for example, blood, bone or fish, the nitrogen or phos- 

 phoric acid shall be derived from or supplied entirely by the material named. 

 When the name of a material is used as a brand or as part of a brand and the 

 nitrogen and phosphoric acid is not supplied by the material named, the word 

 "brand" shall follow the name of the material. Exam])le: "Fish Brand Fer- 

 tihzer." 



Ammoniated Superphosphate is a product containing superphosi)hate 

 and or dissi)lved bone and nitrogcuious compounds, but without the atldition of 

 potash. 



Activated sewage products are made from sewage freed from grit and coarse 

 solids and aerated after being inoculated with microorganisms. The resulting 

 flocculated organic matter is withdrawn from the tanks, filtered with or without 

 the aid of coagulants, dried, ground, and screened. 



