KEEPING (WE COW. 



129 



derground cemented tr.nk or cistern, say of a depth of eight feet 

 and diameter of six to seven feet at the bottom. This tank must 

 be provided with a pump for raising the fluid, the tube of which 

 should terminate in a strainer at about twelve inches from the 

 bottom of the tank. An opening should be left in the top of the 

 cistern for inspection, and for the insertion of a proper implement 

 to stir the sediment. The pump should rise sufficiently high to 

 permit the pumping of the fluid directly into a tank on wheels 

 used for the distribution thereof in the fields. A condemned 

 watering cart, which could probably be purchased cheaply, 

 would be an excellent instrument for this distribution. Sulphate 

 of iron, green vitriol, should be freely used to change the carbon- 

 ate of ammonia into the sulphate, thereby obtaining a fixed, 

 instead of a highly volatile salt. 



