72 ON INCREASING THE GROWTH 



I. Manures rich in nitrogen (forcing). 



1. Substances containing ammonia (very quickly 

 forcing). 



Ammoniacal salts of all sorts, 



Good guano, urates, soot, 



Putrid animal substances, e. g. blood, flesh, 



skins, etc., 

 Poudrette, gas-water, 

 Putrid urine, draining-compost. 

 Fermented stable-manure, especially of sheep 



and horses. 



2. Azotized substances that are easily decomposed 

 (somewhat quickly forcing). 



Horn-shavings, glue, boiled flesh. 



Bones, liquefied by acid, steamed, and finely 

 pulverized, 



Oil-cakes of all sorts, malt-grain and the ref- 

 use of beer-breweries. 



Fresh urine, drainings. 



Stable-manure beginning to rot. 



3. Azotized substances that are decomposed with 

 difficulty (slowly forcing). 



Bone-dust, coarsely powdered. 

 Woollen rags. 

 Fresh stable-manure. 



4. Substances containing nitric acid (quickly for- 

 cing). 



Nitrate of potash (the ordinary saltpetre), 

 Nitrate of soda, or Chili saltpetre. 



