42 ROYAL SOCIETY OF CANADA 



Product 



J310 granimes of 2.94 per cent N. as organic nitrogen 



and ammonia 38.51 



Loss 34.35 per cent 20.15 



Material used as above (V) 58.66 



1310 grammes product at 3.01 per cent N. including 



that of Nitric Acid 39.43 



Loss 32.78 per cent 19.23 



Materials Used (VI) 



200 grammes Moss with 1.56 per cent N 3.12 



3500 grammes Lirine with 0.82 per cent N 28.70 



Total 31.82 



Product 



590 grammes at 3.64 per cent organic and ammonia- 

 cal nitrogen 21.48 



Loss 32.49 per cent . . 10.34 



Materials used as above (VI) 31.82 



590 grammes product at 3.86 including that of Ni- 

 tric Acid 22.77 



Loss 28.44 per cent 9.05 



These latter experiments furnish sufficient proof that in the spon- 

 taneous evaporation of urine and the decomposition of its urea all the 

 nitrogen is not eliminated in the form of ammonia otherwise it would 

 have been retained by the large amount of acid used. Very likely the 

 acid would be more effective if applied during the ordinary fermenta- 

 tion of urine and in the presence of sufficient water. But the object of 

 these experiments is to ascertain how the nitrogen of urine is to be se- 

 cured under the ordinary system of treating manure with excessive ex- 

 posure to the atmosphere. It has to be confessed that the problem is 



