HOME MIXTURES 133 



We have only 1,703 pounds and not 2,000 pounds the amount 

 desired. To make 2,000 pounds an addition of 297 pounds of 

 some make weight material as sand, earth, gypsum, etc., is 

 necessary. 



Supposing we wished to substitute kainit, analyzing 12 per 

 cent, of potash, for the muriate of potash in the above mixture. 

 By calculating as explained above we find that it would require 

 1,000 pounds of kainit to analyze 6 per cent, of potash. This 

 amount would make our total add up to 2,463 pounds, or 463 

 pounds more than we wish. This shows that kainit could not be 

 used to supply all of the potash in a 2,000 pound mixture of the 

 above analysis made from such materials. We could however 

 supply one-third of the potash from kainit and two-thirds from 

 m.uriate of potash. 



Potash lbs. from kainit 40 -i- 12 % -~ 333 lbs. kainit 



Potash lbs. from muriate 80 -i- 50 % = 160 lbs. muriate of potash. 



Assembling the potash salts, acid phosphate and calcium cyan- 

 am id we have : 



Pounds 



Acid phosphate 875 



Calcium cyanamid 588 



Kainit 333 



Muriate of potash 160 



Total 1 ,956 



By using kainit and muriate of potash in the above proportions 

 only 44 pounds of filler would be necessary to add to make 2,000 

 pounds.^' 



