364 SCIENCE PROGRESS 



the new fertiliser will easily compete in price with Chili saltpetre 

 for agricultural purposes. 



In time, therefore, Sir Joseph Wilson Swan's prophecy, of 

 the water power of the world being utilised to furnish the 

 nitrate required for its fertilisation, may be realised ; and the 

 great problem of the continued supply of nitrogen to the soil 

 may be solved, by tapping the practically inexhaustible reservoir 

 of nitrogen contained in the atmosphere which surrounds 

 our earth. 



