24 CONTROL SERIES NO. 126 



AGRICULTURAL LIME PRODUCTS 



Manufacturers and Brands 



During 1945, 13 firms registered for sale in Massachusetts 28 brands of lime 

 products, manufactured and sold for neutralizing acid soils. The products are 

 grouped as follows: 



Hydrated or slaked lime 14 



Pulverized and ground limestone 14 



28 



The analytical results which appear in this bulletin represent officially drawn 

 samples secured by the same sampling agents who drew the samples of commer- 

 cial fertilizer which served for the inspection of that commodity; the samples 

 therefore came from every section of the state and are, we believe, representative 

 of the lime products sold in Massachusetts as soil amendments. 



We were not successful in securing samples of the following brands: 



Brewer <S Co., Inc., 45 Arctic St., Worcester, Mass. 



Green Mountain Handy Hydrate 

 Snow Fluff Agricultural Hydrate 



Conklin Limestone Co., Inc., Canaan, Conn. 



Higli Magnesium Agricultural Ground Limestone 



Limestone Products Corporation of America, Newton, N. J. 



Lime Crest Brand Calcite Hydrated Lime for Agricultural Use 



Solvay Process Co., Syracuse 1, N. Y. 



Solvay Pulverized Limestone 



United States Gypsum Co., 300 West Adams St., Chicago 6, III. 



Red Top Hydrate Lime — Genoa, Ohio 



Explanation of Table of Analyses 



Tables I, II, III, "Neutralizing value expressed in terms of calcium oxide" 

 represents the acid neutralizing value of both the magnesium and the calcium. 

 The figures in the "per cent" column are obtained by a direct titration with 

 standard acid. The "pounds in one ton" are secured by multiplying the figures 

 in the "per cent" column by 20. 



"Insoluble matter" represents material which is insoluble in dilute hydrochloric 

 acid to which a few drops of nitric acid have been added, and is mainly sand. 



Under "Mechanical analysis" the figures represent in round numbers the 

 percentage of product that would pass or be retained by the meshed sieves men- 

 tioned. 



The limestone products have been published in two groups or grades (see 

 tables II and III) according to fineness of grinding and to conform to definitions 

 voted by the Association of Official Agricultural Chemists at their 1936 meeting. 



