Stars and telescopes; a hand-book of popular astronomy, founded on the 9th ed. of Lynn's Celestial motions (1899)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911. Celestial motions · Boston, Little, Brown and company · leaf 402
horizontalthread f a certainnumber oj revohitionswhich are read fromgraduated head K atindex s) Telescopes and Houses for Them 343, use, notably by Professor Burnham in the discoveryand observation of very faint or close double stars*A similar instrument of unusual proportions was.built by Warner… … a modern micrometer {With battery of eyepieces, oil 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…
Astronomy
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