The numbers of Psyche issued during the past year were 
mailed on the following dates : 
Vol. 56, no. 4, Dec., 1949: January 19, 1950 
Vol. 57, no. 1, March, 1949 : June 16, 1950 
Vol. 57, no. 2, June, 1950: September 29, 1950 
Vol. 57, no. 3, Sept., 1950: December 29, 1950 
