10 



BONES. 



233. Darling's Fine Bones. Collected of Parker & Gannet, Bos- 

 ton, Mass. 



Guaranteed composition ; phosphoric acid, 25 per cent. ; 

 nitrogen, 3 to 4 per cent. 



Valuation per 2000 lbs., $50.25 



AMMONIATED SUPERPHOSPHATES AND COMPLETE 

 MANURES. 



Moisture in Fertilizers. The quantity of moisture contained in a 

 compound fertilizer exerts a controlling influence on the results of its 

 analysis ; and yet, comparatively speaking, but few manufacturers 

 mention in their printed guaranty of composition, the approximate 

 amount of that constituent in their articles, upon which their guaran- 

 teed composition is based. 



An article, for instance, which, with 10 per cent, of moisture, 

 analyzes 10 per cent, of soluble phosphoric acid, 2.5 [)er cent, of 

 nitrogen, and 5. per cent, of potassium oxide, will analyze 9. per 

 cent, of phosphoric acid, 2.25 per cent, of nitrogen, and 4.5 per 

 cent, of potassium oxide, in case of containing 19 per cent, of mois- 

 ture. 



Statements of comparative tests regarding the exact composition of 

 two fertilizers, are, for this reason, always made with a definite ref- 

 erence to a corresponding state of their moisture. Manufacturers 

 who state the composition of the articles they offer for sale, without 

 mentioning, at least approximately, the amount of moisture they con- 

 tain, deprive the inspector of the chance to recognize exceptional 

 conditions in their goods. 



The manufacturer of fertilizers is expected to state, in the interest 

 of his customers, the total weight of the article contained in each 

 package ; — besides — within certain limits — the amount of phosphoric 

 acid, nitrogen and potassium oxide he offers for sale in each hundred 

 weight. As long as the fertilizer is carefully stored, no serious alter- 



