Stars and telescopes; a hand-book of popular astronomy founded on the 9th ed. of Lynn's Celestial motions (1901)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911 · Boston, Little, Brown · leaf 397
and electric lamps, etc.) with the heliometer (page 277) ; but more especiallythe photographic plate and measuring engines are re-placing both. As early as 1850 the younger Bondobtained with the 15-inch Harvard telescope, finephotographic impressions of Vega, and later of thedouble star Castor,… … mm$ 1S54, the first celestial phenomenon photographicallyobserved. By measuring his plates of Mizar, Boxdin 1857 proved photography capable of results equallyprecise with direct observation of stellar images. Theyear following, Rutherfurd of New York undertookcelestial photography at his private…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
