136 Report op the Acting Director and Chemist of the 



Example : What is the commercial valuation of one ton of sul- 

 phate of potash which tests 50 per cent, (low-grade) sulphate ? 



50 X 0.54: = 27 per cent, of actual potash. 



27 X 5^ cents = $1,42, value of 100 pounds of sulphate of potash. 



$1.42 X 20 = $28.40, value of one ton of sulphate of potash test- 

 ing 50 per cent, sulphate. 



Example : What is the valuation of one ton of sulphate of potash 

 which tests 95 per cent, (high-grade) sulphate of potash ? 



95 X 0.54 = 51.3 per cent, of actual potash. 



51.3 X 5| cents = 269 cents X 20 = $53.80 value of one ton of 

 sulphate of potash testing 60 per cent, sulphate. 



When the per cent, of actual potash is given, the first step can be 

 omitted, and the per cent, of actual potash multiplied by the price 

 and then by 20. 



(2) Muriate of Potash. Rule. Multiply the given per cent, 

 of muriate by 0.63 and the result by the price of one pound of 

 potash in the form of muriate (see price-list on page 132). Multiply 

 this result by 20. 



Example : What is the valuation of one ton of muriate of potash 

 testing 85 per cent, muriate ? 



85 X 0,63 =: 53.55 per cent, of actual potash. 53.55 X 4i cents 

 = 241 cents X 20 = $48.20 a ton. 



Second Method for Making Commercial Valuations of Mixed 

 Fertilizing Materials. 

 linle. Multipl}^ the given per cent, of each constituent (nitrogen, 

 phosphoric acid and potash) by its list-price, add the products and 

 multiply the sum by 20. 



Example : What is the valuation of one ton of a commercial fer- 

 tilizer having the following guarantee-analysis 1 



Nitrogen 2 (to 3) per ceut. 



Available phosphoric acid.. .. 8 (to 10) " 



Potash 3(to5) " 



In each case where a guarantee-analysis gives two figures, always 

 use the lower, because the law takes only the lower guarantee into 

 consideration. 



2 (per cent, nitrogen) X ^^% cents (price of 1 lb. nitrogen) = 0.33 cents. 

 8 (percent, av. phos. acid) x Scents (price of lib. av.phos. acid) = 48 " 



3 (per cent, potash) X 5 cents (price of 1 lb. potash) = 0.1.5 " 



Total value of 100 pounds of fertilizer = 0.96 <' 



0.96 cents _l-20 = $19.20 a ton = 



