36 



is of the very greatest importance. Professor Priestley, of Leeds 

 .University, has been for some time engaged in making investi- 

 gations when time permitted him to do so. His researches entail 

 an immense amount of work and must necessarily extend over a 

 period of years, for besides analytical work in the laboratory, the 

 crops have to bs carefully watched, and every condition of the soil 

 they grow in taken into consideration. Therefore it is obvious 

 that some years must elapse before we can expect to have placed 

 before us, as the result of his important researches, a practical 

 treatise which will guide us in how to apply the electric discharge 

 with the greatest advantage to our different crops. 



W. J. McKcnzie, The Devonshire Press, Torquay. 



