32 THE CONNECTICUT AGRICULTURAL 



Analyses and Valuations. 



Nitrogen Nitrogen „ 



Station of of Soluble Reverted Intsoluble Estimated Cost 



No. Ammonia Organic Phos. Phos. Phos. Potash. value per ton. 



Salts." Matters. Acid. Acid. Acid, per ton. 



875 L14 2.63 .84 ..39 .25 17.26 25.00 



948 .80 .16 1.12 .:18 1.31 10.56 25.0a 



855 .08 .19 none 1.76 .72 .16 5.19 25.00 



856 .29 2.51 



The average cost of the nitrogenoiis superphosphates excluding 

 the four just raentionecl, is $41.42; the average estimated value 

 is 134.92, and the average difference between cost and valuation 

 is $6.50. 



For the last four years the average cost and the average differ- 

 ence between cost and estimated value have been as follows : 



1880. 



Average cost $39.00 



Average difference, _ $3.00 



Since the trade values used by the Station in computing esti- 

 mated values have been prepared yearly from the market reports 

 and always in the same manner this larger discrepancy in the 

 present year between cost and valuation cannot be due to any 

 arbitrary change in our trade values. It is most likely explained 

 by the fact tliat the prices of manufactured goods have not gone 

 down during the last eighteen months while many of the raAV ma- 

 terials used in their manufacture have been steadily becoming- 

 cheaper. A further discussion of this matter will be found in the 

 Review of the Fertilizer Market. 



About one-third (23) of the samples have not contained the full 

 minimum amounts of nitrogen, phosphoric acid and potash, guar- 

 anteed by the makers. In most cases, however, the difference 

 between the composition and guarantee was quite small and only 

 involved a single ingredient. 



' The Comparison of Different Superphospliates of the Same 

 Brand and of the Analyses with the Guarantees, on pages 39 

 to 43, serves to show first the variations in samples of the same 

 brand which are caused by carelessness in the preparation of the 

 o-oods or in their storage, errors in sampling, etc., and second, 

 how nearly the actual composition of the superphosphates agrees 

 with what is claimed for them by their manufacturers. 



