720-732	November 1929 Article Building the 200-inch telescope By George Ellery Hale SEE ALSO: Astronomical instruments; Astronomical observatories; Mount Wilson Observatory (Calif.); Telescopes PDF IMAGES
732-738	May 1929 Article The exploration of space By Edwin Powell Hubble SEE ALSO: Astronomical instruments; Astronomy; Nebulae; Stars; Telescopes PDF IMAGES
409-415	February 1899 Article The astronomical outlook. As related to the perfection of our instruments and methods of observation By Charles A. (Charles Augustus) Young SEE ALSO: Astronomical instruments; Astronomical photography; Astronomy; Observations PDF IMAGES
540-556	March 1897 Article Astronomical progress of the century By Henry Smith Williams SEE ALSO: Astronomical instruments; Astronomical photography; Astronomical spectroscopy; Astronomy; Career in astronomy; Bessel, F.W. (Friedrich Wilhelm); Meteoritic hypothesis; Nebulae; Observations; Portraits; Herschel, John F.W. (John Frederick William), Sir; Lockyer, Norman, Sir; Stars; Olbers, W. (Wilhelm) PDF IMAGES
825-841	November 1874 Article Some talks of an astronomer By Simon Newcomb SEE ALSO: Astronomical instruments; Astronomy; Comets; Observations; Orbits; Planets; Sun PDF IMAGES
518-531	September 1874 Article Observatories in the United States (II) By J.E. (Joseph Everett) Nourse SEE ALSO: Astronomical instruments; Astronomy; Cambridge; Dudley Observatory PDF IMAGES
25-52	June 1856 Article Astronomical observations in the United States By Elias Loomis SEE ALSO: Astronomical instruments; Astronomical observatories; Astronomy PDF IMAGES