188 Fertilizers 



by the schedule prices a pound, gives the valuation per 

 ton, as shown in the fourth column. 



GROUND BONE 

 12 3 456 



% or Ibs. % of Value Estimated 



per fine- % or Ibs. Lbs. per lb. value 



00 ness per 100 per ton cts. per ton 



4X50= 2 in fine X20= 40X 21.5 = $8.60 

 4 X 50 = 2 in coarse X 20 = 40 X 17.5 = 7.00 



Nitrogen 

 Phosphoric 



20X50= 10 in fine X20 = 200X 4.0= 8.00 

 acid . . 20 X 50 = 10 in coarse X 20 = 200 X 3.5 = 7.00 

 Total estimated value a ton $30.60 



The first column of figures shows the per cent, or 

 pounds per hundred, of the constituents, which is mul- 

 tiplied by the percentage of fineness, which gives the 

 percentage or pounds to the hundred of fine or coarse 

 in the third column. The calculation is then finished as 

 in the case of complete fertilizers. 



THE UNIFORMITY OF MANUFACTURED BRANDS 



Another point which consumers of fertilizers are in- 

 terested in is the reliability of the various brands. That 

 is, they desire to know whether a brand that shows good 

 forms of nitrogen, of phosphoric acid, and of potash in 

 one year may be depended upon to furnish approximately 

 the same the following year, or whether the manufacturers 

 change their formulas from year to year to conform to the 

 relative cost of the different materials; that is, whether 

 when nitrogen is relatively expensive and phosphoric 

 acid is relatively cheap, they introduce a larger proportion 

 of phosphoric acid and a smaller percentage of nitrogen ; 

 whether when organic nitrogen is cheap and nitrate and 



