TOOLS AND SUPPLIES 39 



For that reason, stoppers are kept in ammonia 

 bottles, and air-tight covers should be kept on the 

 supply of hen-manure. Covers can be dispensed 

 with if acid phosphate is used with hen-manure. 

 It retains the ammonia in a non-volatile form. 

 Care in collecting and storing these especially 

 valuable fertilizers will greatly add to their value 

 and increase largely the garden income. 



