This is a black and white image of several life test racks and ovens. Light is coming from the windows behind the racks and ovens. Written on verso side in Eckert's hand is "Several life test racks and ovens used to age semi-conductor diodes and transistors. The rack in the left rear is used to test resistors." The words "A few of the" and "test" were crossed off in blue pen within the paragraph. Written in pencil is "4 1/6...". Written in pencil on small white round label on original protective sleeve is "1138-1".