i63 



pass the mixed materials through the sieve, and having ^°°^ ^^^ 

 secured an even admixture, store the finished materials _^i_ 

 away in bags or barrels until needed for use. 



Examples. — We want a complete high-grade fertilizer 

 for general use, and decide it shall contain from 4 to 5 per 

 cent, of Nitrogen, 8 to 9 per cent, of phosphoric acid, and 

 from 6 to 7 per cent, of potash. In making an approximate 

 estimate of our wants we will take the higher numbers given. 

 Then for one ton we want — Nitrogen 5 per cent. (or 5 pounds 

 in each 100 pounds of fertilizer) X 20 ^ 100 pounds, phos- 

 phoric acid (available) 9 per cent. X 20 =: 180 pounds, and 

 potash 7 per cent. X 20 ^ 140 pounds. 



The tables of analyses in the appendix have been care- 

 fully consulted before purchasing and our raw materials 

 have been bought upon guaranteed analyses, are of good 

 merchantable quality and are up to the standard of guarantee. 

 We conclude to get our three essential components from a 

 variety of materials and proceed thus: 



Mater- 

 ial, 

 Lbs. 



200 

 250 

 100 



350 

 800 



200 



100 



2,000 



Nitrate of Soda 



Sulphate of ammonia.. . . 



Dried blood 



Dissolved bone meal 



Dissolved bone-black. . . . 



Muriate of potash (chlor- 

 ide) 



Sulphate of potash (high 

 grade) 



Total quantities in I ton. 

 Per cent, in I ton 



Nitro- 

 gen, 

 Lbs. 



Phosphoric Acid, Lbs. 



Avail- 

 able. 



31-50 

 51.25 



10. 52 



9-10 : 47-35 

 133-60 



102 

 5 



37 

 II 



180.95 

 9.04 



Insolu- 

 ble. 



1. 91 

 14.24 



2.40 



18.55 



.92 



Total. 



I. 91 



61.59 



136.00 



Potash, 

 Lbs. 



199.50 

 9-97 



104.92 



38.60 



14352 



7-17 



Now let us suppose that out of these same materials we 

 wish to make a fertilizer containing from i to 2 per cent, of 

 Nitrogen, 6 to 8 per cent, of phosphoric acid, and from 2 to 3 

 per cent, of potash. We have four ingredients that supply 

 Nitrogen, namely. Nitrate of Soda, sulphate of ammonia, 

 dried blood, and dissolved bone meal, and they supply it in 

 the three forms of nitric acid, ammonia, and organic Nitrogen. 



