50 



CONTROL SERIES No. 51 

 Pulverized Animal Manures. 



a Ammoniaeal nitrogen 1.10%. 



Stone Meal. • 



Manufactured by William N. McCrillis. 



a Soluble in aqua regia. 



The analysis of three samples of this Stone Meal, sampled at three different 

 places (all in Barnstable County), is given above. None of the potash was soluble 

 in water. There was 2.50 per cent of carbon dioxide (CO2) present, equivalent to 

 2.84 per cent carbonate of lime and 2.40 per cent carbonate of magnesium, which 

 would have about 1/19 the neutraUzing effect on sour soils as would one ton of 

 average ground limestone. Assuming, however, that all of the lime, magnesium, 

 phosphoric acid and potash found soluble in dilute hydrochloric acid was effective 



