100 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1919. 



attempted. At the convention held in London in 1910 a committee 

 was appointed and authorized to form similar combinations with 

 the publishers of other indexes and yearbooks, but, unfortunately, 

 for various reasons it has not yet been possible to form such com- 

 binations to the extent authorized by the convention. 

 Very respectfully, yours, 



Leonard C. Gunnell, 



Assistant in Charge. 

 Dr. Charles D. Walcott, 



Secretary Smithsonian Institution. 



