[macfarlane] conservation OF NITROGEN IN MANURE 43 



yet unsolved, but nevertheless the experiments will be continued in the 

 hope of ultimately attaining success. 



So far as regards the trials which have been made to effect the con- 

 version of ordinary excreta into an inoffensive product, which was the 

 chief object in beginning this investigation I am glad to be able to state 

 that they continue to give the most satisfactory results. The most 

 recent arrangement which has come into practice for this purpose is 

 given in the drawing which accompanies this paper. 



