452 JOURNAL OF THE WASHINGTON ACADEMY OF SCIENCES VOL. 13, No. 20 
on the problem of field treatments. A bibliography of 3,000 titles has been 
assembled. A better knowledge of the fundamental principles governing 
soil treatments, is greatly needed to aid in the solution of an ever increasing 
number of soil treatment problems. 
166TH MEETING 
The 166th meeting was held Tuesday, March 6, 1923, in the Crystal Dining 
Room of the New Ebbitt Hotel with 146 persons present. 
Following dinner, Dr. W. E. Sarrorp, the retiring President, gave an 
address on Economic botany as a means of determining the origin and 
dissemination of primitive tribes. 
Dr. A. F. Woops, President of the University of Maryland and first Presi- 
dent of the Botanical Society of Washington, was present as guest of honor. 
After the address there was dancing. 
Roy G. Pirrcer, Recording Secretary. 
SCIENTIFIC NOTES AND NEWS 
F. E. Marrues, of the U.S. Geological Survey, gave a lecture on November 
3 before the Brooklyn Institute of Arts and Sciences on The cliffs and water- 
falls of the Yosemite Valley. 
T. WayYLAND VauGHAN and A. H. Brooks, who represented the Geological 
Survey at the Pan-Pacific Scientific Congress in Australia, have returned to 
Washington. 
Pau C. Stanpuey, of the National Museum, left recently for Panama, 
where he is to continue the investigation of the flora of the Canal Zone, a work 
commenced several years ago. 
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