OF PLANTS BY MANURING. 73 



Nitrate of lime, or decayed stable-walls (see 



page 40), 

 Rubbish of old clay walls. 

 Old compost-earth. 



II. Manures rich in Carbon (forming humus). 



Stable-litter, straw, foliage, weeds, etc., 

 Forest-leaves, sawdust, lawn and garden trim- 

 mings. 

 Rotten mould, turf, earthy brown-coal, 

 Generally, vegetable substances of all sorts. 



III. Manures containing Potash (strongly forcing). 



Potash, nitrate of potash, malt-grain from beer- 

 breweries. 



Urine of breeding cattle, wood-ashes. 



Foliage, stalks and leaves of all sorts, lawn 

 and garden trimmings. 



Building-rubbish, street-sweepings, compost, 



Burnt clay and loam, 



Marl of many sorts. 



IV. Manures containing Soda (less visibly opera- 

 tive). 



Common salt, refuse salt. Chili saltpetre. 



Soap-boilers' lye, urine. 



Certain sorts of manuring salts. 



Soda felspar, and some other kinds of stone. 



Soapsuds, dish-water. 



V. Manures rich in Phosphoric Acid (seed-forming). 



Burnt bones, bone-black, sugar refuse from 

 refineries, 

 7 



