4 images. Moon eclipse, 1957. 4 different phases of eclipse as seen thru 14 inch telescope at Griffith Park Observatory; Dr. Dinsmore Alter (Observatory Director); Dr. Charles Critchfield (Director of Scientific Research at Convair).; Caption slip reads as follows: "Photographer: Wesselmann. Date: 1957-11-07. Reporter: Coart. Assignment: Moon eclipse. 7/8/9/10: Four different phases of the eclipse as seen through the 14" telescope at Griffith Park Observatory. 5: Dr. Dinsmore Alter, observatory director, peering at the moon eclipse through the new public scanning screen at Griffith Park. 14: Dr. Charles Critchfield, director of scientific research at Convair, was present this a.m."