DEPARTMENT OF CHEMISTRY 



J. B. LiNDSEY, Chemist. 



INSPECTION OF AGRICULTURAL LIME PRODUCTS 

 FOR THE SEASON OF 1924. 



i;y h. d. haskins, chemist is charge, assisted by l. s. walker and 

 g. c. dalrymple 



MANUFACTURERS AND BRANDS 



During: 1924, 18 dift'erent tirms and individuals registered 21 different brands 

 of agricultural lime and 2 brands of gypsum. Tbe following classitication shows 

 the general character of the ]>roducts : — 



Hydrated or slaked lime 11 



Lime ashes 3 



Precipitated lime 1 



Ground limestone 5 



Ground shell lime 1 



Total 21 



Gypsum or land plaster 2 



With the following exceptions, four in number, all of the products registered 

 have been sampled and analyzed. 



PRODUCTS NOT COLLECTED 



Brewer & Co., Inc., Worcester. Ma.ss.. Chainplaiu Valley Agricultural I-iiuc and Wood 



Ashes : Champlain Valley Agricultural Limestone. 

 George A. Lawrence, Holyokc. ^lass.. Lime Ashes. 

 New England Lime Co., Adams, Mass.. Connecticut Agricultural Lime. 



HYDRATED OR SLAKED, PRECIPITATED AND AIR-SLAKED 

 LIME AND LIME ASHES 



A reference to Table I shows that with one exception the guarantees of 

 calcium and magnesium oxides have been well maintained in these forms of 

 lime. The Limestone Dust, {)ut out by the New England Lime Com])any, is a 

 a more variable product than the average lime jnit out for agi-icultural purposes. 

 The source of the product is the verj-^ tine dust originating in the rotary kilns. 

 The dust is collected in dust chambers and is almost as fine as precipitated lime ; 

 100 per cent of the product will pass through a 200-mesh sieve. The variation 

 in composition is largely due to the proportion of carbonic acid which is absorbed 

 by the product, producing carbonate of lime. The product showed a deficiency 

 of 3.8 per cent of calcium oxide. The company state that none of the product 

 was sold during the season. The sample which served for analysis was taken by 

 our sampling agent at the kiln. 



GROUND LIMESTONE AND GROUND SHELL LIME 



No deficiencies were found either in (calcium or magnesivuu oxides in the 

 analysis of the gi-ound limestones and ground shell lime. 



