CALCULATION OF AMMOXLV REQUIRED FOR SAXOXY. 323 



acid, potash, lime, Szc. ; and consequently, that the con- 

 tinuous application of salts of ammonia would involve no 

 exhaustion of the soil. If we now reckon how much 

 salts of ammonia, by weight, would be necessary for the 

 kingdom of Saxony, in order to obtain half as much 

 corn again as the uumanured land produces, the result is 

 the following : — The kingdom of Saxony comprised, in 

 the year 1843, 1,344,474 acres (1 acre=l-368 Eng. 

 acre) of arable land, exclusive of vineyards, gardens, 

 and meadows. If we suppose that each acre yields one 

 corn-crop in two years, and that 4 cwt. salts of ammonia 

 had to be applied in the way of manure, the kingdom of 

 Saxony would require annually 2,688,958 cwt. =134,447 

 to7hS of salts of ammonia. 



Those who possess even a slender acquaintance with 

 chemical manufacture, and know from what raw mate- 

 rials (animal refuse and gas water) salts of ammonia are 

 procured, must easily see that all the manufactories in 

 England, France, and Germany put together, could not 

 produce so much as the fourth part of the salts of 

 ammonia required by comparatively a very small country, 

 in order to increase its products in the manner proposed. 



With a similar distribution we can easily calculate how 

 much salts of ammonia would be required for the 

 German pro\dnces of Austria with 11 million jochen 

 (ljoch= 1-422 Eng. acre) of arable land; for Prussia, 

 with 33 milhon morgen (1 morgen=0*631 Eng. acre) ; 

 for Bavaria, with 9 milhon tagwerk (1 tagwerk= 0-842 

 Eng. acre) ; and even if it . were possible to quadruple 

 the manufacture of salts of ammonia, this would have 

 no material influence upon the crops. 



The cheapest ammonia is conveyed to Europe in 

 Peruvian guano, which, taking a high 

 16 per cent. 



Y 2 



