Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Actinometer.
Exposure.
Camera
Extension.
Ray Filter.
Date Time Light Stop
April 13, 1930 4 P.M. Misty U.S. 16 1/5 Full. K2 B+21 1/8
May 28, 1930 2 P.M. Clear U.S. 32 30 Full. K2 B+21 1/8
Do. Do. Do. Do. Do. Do. Do. Do.
June 28, 1930 2 P.M. Clear U.S. 16 1/25 Full- K2 B+21 1/8
June 1, 1931 4 Pm. Clear U.S. 8-16 1/25" Tag. K2 "
June 1, 1931 " " U.S. 16 " " " "