266 BOARD OF AGRICULTURE. 



This year it is $8.00 excludiug certain brands for which there is 

 evidently a serious overcharge. 



4. The Station vahiationa stand in no direct or necessar}' relation 

 to the comparative profits which may be derived from the use of the 

 various fertilizers by individual farmers. The^e values have an 

 almost purely commercial significance, and are not designed to point 

 out to a farmer whether he shall use potash, which is a comparatively 

 cheap ingredient, or nitrogen, which is comparatively costl}'. If 

 ordiuar}' superphosphates are compared, however, on the basis of 

 commercial valuations it will be found to be true in general that their 

 fertilizing power is in proportion to the money value. 



The following schedule of trade values used in this State for 1887 

 is the one agreed upon by the experiment stations of Massachusetts, 

 Connecticut and New Jersey, after a careful study of prices ruling in 

 the large markets of New' England and the Middle States. 



For comparison, the trade values used in 1886 are also given : 



Trade Values of Fertilizing Ingredients in Kaw Materials 



AND Chemicals for 1S87. 



1886. 1887. 



Cts. ^Ib. Cts. •^Ib. 



Nitrogen in ammoina salts ISA 17i 



'' ill nitrates ISi IG 



Organic nitrogen in dried and tine ground tish 17 17i 



'* in jizotin, ammonite and dried and jjround 



meat 17 17d 



Organic nitrogen in cotton .seed, linseed meal and in castor 



pomace 17 17i 



Organic nitrogen in dried and tine ground blood 16i 



'• " in tine ground bone 17 16 



" '' in tine medium bone 15 14 



*' " ill medium bone 13 12 



** " in coarse medium bone 11 10 



" '^ *' bone, horn shavings, bair and 



fish scrap 9 8 



Phosphoric acid, soluble in water 8 8 



'• '• " in ammonium citrate (coninionly 



called '-reverted'*) 7i 74 



Phosphoric acid, insoluble, in dry fine ground tisb and in 



fine bone 7 7 



Phosphoric acid, insoluble, in tine medium bone 6 6 



'^ " " in medium bone 5 5 



'' '* *' in coarse medium bone 4 4 



'* '• " " bone 3 3 



'' " '' in fine ground rock phosphate 2 2 



Potash as high grade sulphate oh 54 



kainite 4i 4^ 



" muriate 4| 4i 



