232 



APPENDIX. 



These results show that the quantity of this manure necessary for one 

 hectare of land (4 Hessian acres) during five years contains ; — 



Carbon 



Hydrogen 



Oxygen 



Nitrogen 



Salts and earths 



Kilogrammes. 



3637'G 



426-8 



2521-5 



203'2 



3271-9 



COMPOSITION OF THE PRODUCE OF THE LAND DRIED IN 

 VACUO AT 110° C. 



1. ROTATION. 



