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 396
ry horizontalthread / a certainnumber oj revolutions•which 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 wasbuilt 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
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
