90 PRACTICAL FARM CHEMISTRY. 



manufactured fertilizers are found to be larger than 

 indicated by the makers' own printed analyses. 

 Frauds are occasionally attempted, but the intelli- 

 gent and careful farmer need not allow himself to 

 be swindled. 



Some of the experiment stations, as for instance 

 that of New Jersey, not only give the analyses in 

 great detail, but also save us the work of figuring 

 out the values, etc., of analyzed fertilizers. These- 

 tables have a column marked '* Value of 2000 

 pounds at station prices." The figures in this ex- 

 press the value of the three substances of plant food 

 in each fertilizer, computed on the basis of the 

 prices at which the ingredients could be bought at 

 retail for cash in our large markets (in the raw ma- 

 terials which are the regular source of supply). 

 The other column gives us "the selling price of 

 2000 pounds at consumer's depot." For this no 

 further explanation is needed. 



From a table of analyses found in a recent bulletin 

 of the New Jersey Experiment Station, I take the 

 following figures representing analyses of a certain 

 potato manure: 



Nitrogen from nitrates, - - - - 0.83 



" from ammonia salts, - - - 1.54 



" from organic matter, - - - 1.89 



" Total found, - - - - 4.26 



•* Total guaranteed, - - - 8.69 



Phosphoric acid soluble in water, - - - 8.96 



«' *' " in ammonium citrate, - 5.82 



•• insoluble, ... - 3.85 



" " Total found, - - - 13.12 



" " Total guaranteed, 



" " Available, found, - - 9.77 



«• " " Guaranteed, - - 8.00 



Potash found, - - - - 7.19 



•* Guaranteed, - - - - 6.00 



Chlorine, 0.71 



