The oldest picture Patent clerk 1920 1912
1931 Radio talk Barcelona, 1923 Berlin 1922
Haberlandstraße
Berlin 		Berlin Santa Barbara, 1933
(1)		  
Violin, 1929 Violin, 1941   Princeton
Vacation Sailing early 1940s Princeton,1937
At the blackboard   Princeton Winter
The last blackboard 1947 1950