Ted Watterson collection on Palomar Mountain telescopes, 1936-1948.
Photographic history of the construction of the telescopes on Palomar Mountain.
Palomar Observatory -- History.
Astronomical instruments -- Design and construction.
Astronomical observatories -- History -- United States -- California.
Telescopes (Astronomy) -- Design and construction -- History -- Photographs.
AIP-ICOS
California Institute of Technology. Institute Archives. 1201 East California Blvd. (Mail Code 015A-74), Pasadena, CA 91125, USA