172 INSECTS AND HEREDITY 



ago. It is not creditable to have left to our artist brethren 

 a subject of such paramount importance to ourselves; for 

 to them belongs the honour of having made the only- 

 serious attempts to improve our practice and to call 

 attention to the evil. 



To the trades concerned I would say that it is strange 

 want of enterprise to continue methods and use materials 

 which only require to be thoroughly understood to ensure 

 a swift and sudden collapse for all but the most ephemeral 

 purposes. I know no producer, scientific or other, whose 

 self-respect would suffer the employment of materials, 

 however good the effect, however low the cost, which 

 would not last over so brief a period as five-and-twenty 

 years. 



I desire to thank Mr. Horace Hart, Controller of the 

 Oxford University Press, and Mr. J. W. North, A.R.A., 

 for the kind manner in which they have freely given 

 information on this most important matter. 



