end we shall be glad to co-operate with him in conducting experi- 

 ments whicli are designed to illustrate principles, discover new facts, 

 or overcome prevailing difficulties. 



Let us hear from you so that we may liave an opportunity of 

 initiating experiments of value in your locality. 



Wishing you a prosperous season, believe me, 



Yours faitlifully, 



JOHN CPtAIG. 



434 



