From the June 13, 1936, issue
By Science News
HUGE SPECTROGRAPH FOR ECLIPSE OBSERVATION
The giant camera shown on the front cover, one of the largest spectrographs ever built, will be used by the joint Harvard-Massachusetts Institute of Technology expedition to observe the total eclipse of the sun on June 19, from a special station at Ak-Bulak, Siberia. The Instrument is made of dowmetal, 96 percent magnesium and 4 percent aluminum, an exceptionally lightweight alloy. The entire spectrograph box, 12 feet by 3 feet by 5 feet, with its complex mountings, weighs less than half a ton. Dr. Donald H. Menzel, director of the expedition, is at the right while Henry Hemmendinger, Harvard graduate student who will be a member of the party, is at the left.