3o6 Bulletin 146, 



The work under the Nixon Bill has been thrown into two general 

 categories — that which is primarily investigational, and tliat which i.i 

 mc^re directly educational. Brief reports of progress in the investiga- 

 tional work have been furnished by the divisions having the special 

 sul;jects in charge. In some cases much of the work has been done 

 by the head of the division; in others, it has been carried on by 

 assistants under his direction. 



It is impossible to fully set forth in this brief space the full scope of 

 the investigations completed and now in progress. The work has been 

 unusually fruitful in results which have either been set forth at length 

 in bulletins, or will be published in the near future. 



Following are reports of the various departments concerned in the 

 investigational work: 



