nitrification are more favorable and the beds are protected ^ood for 

 from the leaching action of storms. ^" ^ 



To ensure rapid nitrification all the food elements required '59 

 by the nitric ferment must be present. The ash ingredients 

 of plants, phosphates, ammonia, carbonaceous matter, and 

 an excess of oxygen must be present. 



Peat containing much copperas, coal-tar, gas-lime con- 

 taining sulphites and sulphides, kill the ferment. The 

 Nitrate ferment is developed during the slow^ decay of 

 organic matter in all soils. 



How to Make Commercial Valuations. 



First, of unmixed chemicals. 



Multiply the guaranteed per cent, of ^.^^^^^ ^^ g^^^^ 

 JNitrate or boda by 10.47, which gives the 

 per cent, of Nitrogen; multiply the per cent, of Nitrogen thus 

 obtained by the trade value of Nitrogen in the form of 

 Nitrates (15 cents per pound), then multiply the last result 

 by 20, which gives the value per ton. 



Example. — A Nitrate of Soda is guaranteed to be 95 per 

 cent, pure; that is, the total impurities in it amount to 5 per 

 cent. : 95 X 16.47 == ^S-^^ P^^ cent, of Nitrogen; 15.64 X ^5 

 (trade value for 1892) ^ 234 cents, or $2.34, value of Nitro- 

 gen in 100 pounds; $2.34 X 20 zr $46.80, value per ton. 



Multiply the per cent, of ammonia by c r v, t f 

 .82^'^, and then multiply the result by the , 

 trade value of Nitrogen in ammonia salts, 

 \']\ cents; multiply the result by 20, which gives the value 

 per ton. 



Example. — A manufacturer guarantees his sulphate of 

 ammonia to contain 22 per cent, of ammonia: 22 X -^235 rz: 

 18.12 per cent, of Nitrogen; 18.12 X ^l\ ^ 317 cents, or 

 $3.17, the value of Nitrogen in 100 pounds of sulphate of 

 ammonia; $3.17 X 20 z= $63.40, value per ton. 



Multiply the guaranteed per cent, of sul- c 1 u f * 



1 ,- 11 I'll 1 OUlp£ld.t6 Ol 



phate ot potash by .54; multiply the result p f v, 



by the trade. value for potash in high-grade 



sulphate (5 cents) and multiply the last result by 20. 



Example. — A high-grade sulphate of potash is guaranteed 

 by the manufacturer to contain 45 per cent, of sulphate of 

 potash: 45 X -54 ^= 24.30 per cent, of actual potash; 24.30 



