DEPARTMENT OF CHEMISTRY. 



J. B. LiNDSEY, Chemist. 



INSPECTION OF LIME PRODUCTS USED IN AGRI- 

 CULTURE FOR THE SEASON OF 1922. 



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

 RAYMOND W. SWIFT. 



MANUFACTURERS AND BRANDS. 



During the season of 1922, 24 different companies secured registration certificates 

 for the sale of 27 different brands of agricultural lime and 3 brands of gypsum or land 

 plaster. The following classification indicates the character of these products : — 



Hydrated or slaked lime 

 Lime ashes 

 Precipitated lime 

 Ground limestone 

 Ground shell lime 



12 

 4 

 1 

 9 

 1 



Total 27 



Gypsum or land plaster ............ 3 



With the exception of two samples of ground limestone, representative samples 

 of all of the products registered have been secured and analyzed, and the results 

 appear in the tables of analyses, arranged alphabeticallj'' according to manufacturer's 

 name and brand name. 



Products not collected. 

 Brewer & Co. Inc., Worcester, Mass., Producto Agricultural Limestone. ■ 

 Rockland & Rockport Lime Corp., 45 Milk Street, Boston, Mass., R-R Ground Limestone. 



SLAKED, AIR-SLAKED AND PRECIPITATED LIME AND LIME ASHES. 



From Table I it will be seen that 11 out of 18 brands showed the total oxides 

 (that is, the sum of the calcium oxide and the magnesium oxide) equivalent to or in 

 excess of the minimum guarantee. Only one sample, the Berkshire Hills Company's 

 Agricultural Lime, showed a shortage in both calcium and magnesium oxides. The 

 New England Lime Company's Limestone Dust was deficient 25.54 per cent of calcium 



