66 REPORTS ON INVESTIGATIONS AND PROJECTS. 



tires for use in sandy regions. Other special equipment was provided for 

 field-work. Parties of two, three, or four persons were thus conveyed on 

 trips across regions difficult of access by teams. The Mohave Desert and the 

 Salton Basin in California were crossed, and work was accomplished in cen- 

 tral, western, and southern Arizona, as well as northern Sonora. An average 

 speed of lo to 20 miles per hour may be maintained on even rough desert 

 routes, and parties thus may go quickly from point to point. In the eight 

 months ending September i, the total distance accomplished was 6,000 miles. 



THE STAFF. 



Dr. H. A. Spoehr, of the University of Chicago, has been appointed a 

 member of the staff, taking up his duties in connection with the position on 

 September i. He will devote attention to a group of problems in chemical 

 physiology. 



Dr. W. A. Cannon started in April for an extended trip to Algeria and 

 Egypt for the purpose of extending his studies of desert plants, and has 

 already obtained results bearing upon several problems under investigation 

 by the Department. 



