6o8 SCIENTIFIC NOTES AND NEWS 



Prof. A. A. MiCHELSON, of the University of Chicago, who was until 

 recently engaged in research for the Navy Department at the Bureau 

 of Standards, has been appointed Research Associate at the Mount 

 Wilson Observatory of the Carnegie Institution of Washington, for the 

 year ending July, 1920. 



Mr. Bert Russell, first assistant examiner in the Patent Office, 

 and secretary of the Patent Office Society, has resigned in order to de- 

 vote his attention to chemi co-legal work with the firm of Prindle, 

 Wright & Small, of New York City. 



Mr. C. E. SiEBENTHAL, geologist of the U. S. Geological Survey, will 

 spend a large part of his time this winter in the Internal Revenue division 

 of the Treasury Department assisting in the adjustment of the income- 

 tax valuation of mining properties. 



Prof, C. A. Skinner, formerly head of the Physics Department at 

 the University of Nebraska, has recently come to Washington as chief 

 of the Division of Optics of the Bureau of Standards. 



Dr. M. W. Travers, formerly of the Indian Institute of Science, 

 Bangalore, India, and connected during the war with the manufacture 

 of chemical glass in England, visited Washington in October. 



Dr. L. B, TucKERMAN, formerly professor of Theoretical Physics at 

 the University of Nebraska, has recently joined the Engineering Ma- 

 terials Division of the Bureau of Standards. 



Dr. P. V. Wells, of the Bureau of Standards, is on leave of absence 

 and is spending a year in the laboratory of Prof. Perrin in Paris. 



