The SciencesSolar RadiationNew Evidence on the Intensity of Radiation Outside the AtmosphereBy C. G. Abbot, F. E. Fowle,, L. B. Aldrich on October 23, 1915AdvertisementABOUT 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 Smithsonian “Solar Constant” Expedition to Calama, ChileRecent Articles by L. B. AldrichThe PyranometerThe Pyranometer: An Instrument for Measuring Sky Radiation