{ 85 ) 

 barley fields. These solutions have no effect 

 upon lucerii and clover, but are beneficial to 

 the natural meadows, when distributed over 

 as soon as vegetation becomes active. Thus, 

 for example, Schattenman harvested from 

 120 square yards of high and dry meadow, 

 irrigated in proportion as above mentioned, 

 two hundred pounds of grass, while the same 

 extent of untreated land, by the side of the 

 ammoniated plat, gave only 115 pounds. 



Tolly has observed, that the hydrosulphate 

 of ammonia, diluted with water, promotes the 

 growth of pot-herbs. Yet notwithstanding 

 these positive experiments of the above Sa- 

 vans, Bouchardat declares that ammoniacal 

 salts even in very weak liquor are prejudicial 

 to vegetation. 



According to some experiments of Bous- 

 singault, it appears, that ammoniacal salts 

 convey Nitrogen to the plants, though they 

 enter as carbonate; the sulphate, muriate, 

 and other salts of ammonia being decomposed 

 by the carbonate of lime put within the soil; 

 as it is well known, whenever there is a 

 junction of two salts in powders, in presence 

 of the exact quantity of water necessary to 

 their reaction without dissolving the products, 

 8 



