230 AMERICAN MANURES. 



We are at a loss to know whether the Pro- 

 fessor, in rendering the soluble phosphoric acid, 

 has reference to the hydrated or the anhydrous 

 acid. If we regard it as hydrated phosphoric 

 acid, and compare the Professor's analysis with 

 our analyses, the similarity is quite striking, for 

 14-45 per cent, of hydrated phosphoric acid 

 correspond to 10*47 of the anhydrous acid, and 

 10*47 of anhydrous phosphoric acid, or 14*45 of 

 the hydrated, are equal to 22*86 of bone phosphate 

 of lime rendered soluble, not "31*50" (31-54). 

 If the 14-45 per cent, represent anhydrous phos- 

 phoric acid, then 31*54, representing the amount 

 of bone phosphate of lime rendered soluble, is 

 correct, and the three analyses show conclusively 

 how the " Excellenza " during the few months 

 of its existence has depreciated in value as re- 

 gards its phosphoric acid. 



Messrs. Dugdale & Girvin are deserving of all 

 credit in manufacturing and introducing this 

 fertilizer ; and there should be no necessity of any 

 subterfuge in recommending it to the public. 

 Truthful, candid statements are all that is 

 needed ; and if Messrs. Dugdale & Girvin will 

 conform to these, and discard the trickeries of 

 the fertilizing business as it now is, we doubt not 

 that their efforts will be crowned with success, 

 and they themselves will be convinced that 

 a honesty " in this business, as well as in all 

 others, " is the best policy." 



