384 SCIENTIFIC NOTES AND NEWS 



tion of all former members of the Bird Banding Association and the 

 public in general, particularly persons in a position to establish trapping 

 stations. Arrangements are being made to supply volunteer coopera- 

 tors with numbered aluminum bands. 



Dr. N. E. DoRSEY, physicist in charge of investigations of radio- 

 active substances at the Bureau of Standards, resigned from the Bureau 

 in April. He expects to complete his work at the Bureau by the end of 

 June, and will then go into private consulting and testing work. He 

 will give especial attention to those physical problems that are of in- 

 terest to members of the medical profession. 



Mr. E. D. Gordon of the Weights and Measures Division, Bureau 

 of Standards, resigned on Alay 31 to accept a position as sales engineer 

 with the General Automatic Scale Company of St. Louis. 



Mr. C. H. KiDWELL, Chief of the Water Resources Laboratory, U. S. 

 Geological Survey, resigned in May to accept a position with the 

 Solvay Process Company at Syracuse, New York. 



Dr. F. KOLPIN Ravn, of Denmark, visited the Bureau of Plant 

 Industry in May. He was in the United States in the interests of 

 Danish potato growers, as considerable quantities of potatoes are being 

 shipped from Denmark and have to pass certain inspection regulations 

 before being permitted to enter the country-. Dr. Ravn, when in the 

 United States in 1915 as a guest of the Department of Agriculture, dis- 

 covered the stripe rust of wheat in Arizona and later in other western 

 States. 1 



Mr. Cephas Hempstone Sinclair, hydrographic and geodetic 

 engineer in the U. S. Coast and Geodetic Survey, died on May 16, 

 1920, in his seventy-third year. Mr. Sinclair was born at Charlottes- 

 ville, Virginia, December 4, 1847. After graduating from the Uni- 

 versity of Virginia he entered the Coast and Geodetic Survey as an aid 

 in 1873, ^nd had been in the service since that date. For a number of 

 years, ending in 191 3, he was in charge of a party engaged in the survey 

 of the boundary between the United States and Canada. He was a 

 member of the Academy, the Philosophical Society, and the Society 

 of Engineers. 



Dr. Alexander Wetmore of the Biological Survey, U. S. Depart- 

 ment of Agriculture, has gone to Buenos Aires in connection with an 

 investigation into the status of certain of our migratory birds that pass 

 a part of the year in southern South America. Extended field observa- 

 tions to determine local conditions affecting these birds, covering ap- 

 proximately a year, will be made in Argentina and adjacent countries. 



1 After this item went to press word was received that Dr. Ravn died on May 24, 

 at East Orange, New Jersey. 



