198 AMERICAN MANURES. 



RHODES' SUPERPHOSPHATE. 



The above fertilizer, from which samples for 

 analyses were selected, was purchased from 

 Messrs. Yarnall & Trimble, Philadelphia. 1 1 is 

 put up in bags, marked 200 Ibs; the one pur- 

 chased weighed 201 Ibs. The mechanical con- 

 dition of the fertilizer was good. The manu- 

 facturer's circular gives the following analyses, 

 said to be furnished by Prof. Johnson in 1859. 



RHODES' SUPERPHOSPHATE OF LIME. 



Water (expelled at 212) 22-25 22'34 



Matter volatile at red heat 20-17 20'00 



Sand and insoluble matters T82 2*57 



Lime 14-90 15-85 



Phosphoric Acid, soluble in water 13-78 13*85 



" " insoluble " -64 '67 



The above analyses of Prof. Johnson widely 

 differ from our analyses of Rhodes' Superphos- 

 phate. We do not question the correctness of 

 the analyses given by Prof. Johnson in 1859, 

 but there is evidently a marked falling off in the 

 quality since that time ; and to publish these 

 analyses with his or any other eulogistic state- 

 ment, at the present time, is a great injus- 

 tice to the Professor, and shows an evident 

 disposition on the part of the manufacturer 

 or agents to deceive and defraud their customers. 

 As the fertilizer is now manufactured, in con- 

 nection with the price demanded for it, we 

 cannot characterize it as being anything short of 

 a fraud and a cheat. 



