386 PROCEEDINGS OF THE AMERICAN ACADEMY. 



ward to represent the Academy at the one hundredth anniversary 

 of the University of Virginia. 



The following Communication was presented: 



Professor William Duane, "Some Recent Researches in X-Radia- 

 tion." 



The following paper was presented by title : 



"Axes of a Quadratic Vector." By F. L. Hitchcock. 



The INIeeting was then dissolved. 



One thousand and one hundredth Meeting. 



March 23, 1921.— Open Meeting. 



An Open ^Meeting was held at the House of the Academy from 

 four to six o'clock. 



The President in the Chair. 



There were about two hundred Fellows and guests, including 

 ladies, present. 



Mr. LeRoy Jeffers, Librarian of the American Alpine Club, 

 exliibited by lantern slides a series of photographs of " The Natural 

 Wonders of the United States." 



Tea was served at five o'clock in the Reception Room on the 

 third floor. 



One thousand one hundred and first Meeting. 



April 13, 1921. — Stated Meeting. 



The Academy met at its House at 8.15 p.m. 



Vice-President Thomson in the Chair. 



Thirty-nine Fellows and one guest were present. 



The Transactions of the Meeting of ^Nlarch 9th were read and 

 approved. 



The Corresponding Secretary announced the receipt of a 

 Biographical Notice of C. E. Norton by M. A. DeW. Howe. 



The Chair announced the death of the following Fellows: — 



Sherburne W^esley Burnham, Class I., Section 1 (Mathematics 



