S. P. Langley

1834 – 1906

• A proposal is herewith submitted to you for regulating, from this Observatory, the clocks of the Pennsylvania Central, and other railroads associated with it
• Experimental determination of wave-lengths in the invisible prismatic spectrum
• Langley memoir of mechanical flight, pt. I. 1887 to 1896
• Memoir of George Brown Goode
• Memoir of George Brown Goode, 1851-1896, read before the National Academy, April 21, 1897
• On hitherto unrecognized wave-lengths
• On the cheapest form of light
• On the minute structure of the solar photosphere
• Sur les spectres invisibles
• The bolometer and radiant energy
• The exhibit of the Smithsonian astrophysical observatory ...
• The new astronomy