286 



BOARD OF AGRICULTURE. 



for that purpose at the first meeting of the Association of 

 Official Agricultural Chemists at Philadelphia, Sept. 8th and 

 9th, 1884, are hereby recommended for your consideration ; 

 they will be followed hereafter, if not otherwise directed. 

 These rules are in the majority of cases not different from 

 those which have been applied during past years, in con- 

 nection with the State inspection of fertilizers. The only 

 noted change consists in the introduction of higher tempera- 

 ture, — Q5'=> C. instead of 40^ C. — for the determination of 

 the reverted (or reduced) phosphoric acid. It is expected 

 by many of the advocates of this change, that the result ob- 

 tained by it, will secure more harmony among those inter- 

 ested in the commercial valuation of fertilizers. The object 

 in view deserves a trial. 



The prospects for an active trade in the spring are good. 

 The stock of crude materials is reported equal to the de- 

 mand ; and the tendency regarding the cost of agricultural 

 chemicals, as well as compound fertilizers, thus rather in 

 favor of lower prices, when compared with those of pre- 

 ceding years. 



Basis of Valuation op Fertilizers for 1884. 



r. 

 Trade Values of FE!tTiLizi>JG Lvgkedients ix Raw Materials 



AND Chemicals. 



CentB per 



Nitrogen in ammonia salts, 



Nitrogen in nitrates, 



Nitrogen in dried and fine ground fisii, .... 

 Organic nitrogen in guano, and fine ground blood and meat. 

 Organic nitrogen in cotton seed, linseed meal and in castor 



pomace, 



Organic nitrogen in fine ground bone, 

 Oro"anic nitrogen in fine medium bone, 

 Oriranic nitrogen in medium bone. 

 Organic nitrogen in coarse medium bone, . 

 Organic nitrogen in coarse bone, horn shavings, hai 



scraps, 



Phosphoric acid soluble in water. 

 Phosphoric acid soluble in ammonia citrate,* 



and fish 



Pound. 

 22 



18 



20 



18 



18 

 18 

 16 

 14 

 12 



10 

 10 



09 



* Dissolved from iwo grains of phosphate, ungronnd, by 100 C. C. neutral solu- 

 tion of ammonium citrate, sp. gr. l.Ot) in 30 minutes at 40° C, with agitation once 

 in live minutes ; commonly called " reverted " or " backgone" phosphoric acid. 



