Food for ><( 5 rr 122 cents, or ^1.22, the value of actual potash in 

 ^^^°^^ 100 pounds of sulphate; ^i.22 X 20 = $24.40, value per ton. 

 160 „ . , rr. . 1- Multiply the guaranteed per cent, of 

 ^^"^*7{ ^^'^^^ munate (chloride) by .63; then multiply 

 (C on e). ^^^ result by the trade value for potash in 



the form of muriate (4^ cents per pound for 1892), and 

 multiply the last result by 20. 



Example. — A muriate of potash is guaranteed to contain 

 80 per cent, of muriate (chloride): 80 X -63 = 5040 per 

 cent, of actual potash; 50.40 X 42 cents = 227 cents, or 

 j^2.27,the value of actual potash in 100 pounds of sulphate; 

 ;i52.27 X 20 zz ^45.40, value per ton. 



Second. How to make a commercial valuation of a fer- 

 tilizer from a guarantee-analysts as given by manufacturers. 

 The statements of guarantee-analysis as used by manu- 

 facturers differ considerably in form, and the amount of 

 each constituent is usually stated as being between two more 

 or less widely varying limits. Thus, we are offered a fer- 

 tilizer which in the guaranteed analysis is stated to contam: 

 Ammonia, from 2 to 3 per cent.; available 'phosphoric acid, 

 8 to 10 per cent.; insoluble phosphoric acid, 2 to 3 per cent.; 

 and potash, equal to 3 to 5 per cent. In estimating the 

 valuation from such form of statem.ent of analysis the lower 

 numbers should be always used, for the manufacturer is 

 held legally only to the lower figures given in the guarantee. 

 The per cent, of Nitrogen in the guarantee-analysis is most 

 usually given in the form of ammonia, and the per cent, of 

 potash may be given in the form of sulphate or muriate 

 (chloride) of potash. When the per cent, of organic Nitrogen 

 is given multiply the per cent, of Nitrogen by the trade value 

 adopted for organic Nitrogen in mixed fertihzers. But if the 

 Nitrogen is stated in the formof ammonia, multiply the guar- 

 anteed per cent, of ammonia by .8235, which will give the 

 per cent, of actual Nitrogen; then multiply the result by the 

 trade value for organic Nitrogen in mixed fertilizers, which 

 will o^ive the value of the Nitrogen in 100 pounds of fertilizer. 

 Thus, in the fertilizer given above the per cent, of ammonia 

 in the guaranteed analysis is from 2 to 3 per cent. As 

 directed, we take the lower number, 2 per cent.: 2 X -5235 

 = 1.65 per cent, of Nitrogen; 1.65 X 15 1 cents = 25.58 

 cents. 



