26 



Availahlc Phosplioric AciJ. 



F'rom dissolved bone black, 7.8 



From acid phosphate (superphosphate.) 5.9 



Fotas/i. 

 From carbonate of potash, 8.0 



From high grade sulphate of potash, 5.0 



From potash-magnesia sulphate, 5.7 



From muriate of potash, 4.5 



From kainit. 5.1 1 



The figures representing the analyses and guarantees 

 Explanation are per cents or pounds per hundred. (The first two 

 of Analyses columns of figures bearing the plus (-[-) and minus 

 Tables. ( — ) signs show the average standing of the various 

 complete fertilizers for the past fii^e years as regards 

 composition ; they have absolutely no reference to the selling price 

 of the fertilizer but simply show the value in dollars and cents of the 

 excess or deficiency of plant food in comparison 7e.nth what is guaranteed. 

 Some of these figures were taken from less than a five year average 

 for the reason that a number of the brands have not always been 

 found by our collecting agents. In each case the small figure at 

 the right of the column signifies the number of years which are 

 represented in the average. Blanks signify that the brand has only 

 been on the market one year or has only been analyzed once during 

 the five years. 



The column giving "dealer's cash price per ton" shows the cash 

 price that was charged the consumer for one ton of fertilizer at the 

 place where the brand was collected. 



The valuation column shows the retail cash cost in our large mar- 

 kets of amounts of nitrogen, phosphoric acid and potash equivalent 

 to those found in a ton of the fertilizer. 



The "percentage of difference" column shows the percentage 

 excess of the retail cash price over the valuation. 



The "laboratory number" is simply a reference number used in 

 the collection and analyses of the various brands. 



In the nitrogen column the water soluble nitrogen includes 

 nitrogen as nitrates and as ammoniates, with more or less amino 

 compounds, in case of acidulated goods, which rank with the am- 

 monia compounds in availability. The organic nitrogen, as ex- 

 pressed in the tables, is that part of the total nitrogen insoluble in 

 water. The total nitrogen includes all forms of nitrogen present. 



