The SciencesThe Smithsonian “Solar Constant” Expedition to Calama, ChileBy C. G. Abbot on December 14, 1918AdvertisementABOUT THE AUTHOR(S)Recent Articles by C. G. AbbotScience Replies to Secretary Wallace's Article: 'The Scientist in an Unscientific Society'Rotating Projectiles from Smooth-Bore Guns, Smothering a Fire Beneath a Combustible Blanket and moreThe Pyranometer