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 409
nd since known asthe Bache telescope (page 299). The star chartstaken with this instrument in Cambridge and Peru,and with its duplicate, the Draper telescope, haveyielded results of high importance; not only in thedetermination of stellar magnitudes, but, by affordingthe means of studying certain… … VARIABLE NEBULA SURROUNDING ETA CARINAE (ARGUS){Photographed with the i^-inch Boy den telescope) (pages 297-301). By mounting prisms in front ofthe objectives, on the plan first tried by Fraunhofer Telescopes and Houses for Them 3 51 in 1823, all stars in the field impress their spectra,sometimes…
Astronomy
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