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 425
nvariable withchanges of temperature,enforce its use on expe-ditions where astronomi-cal clocks would be im-practicable. The chro-nometer has received butfew cardinal modifica-tions of design since thedays of John Harrison,who early in the iSthcentury began his great invention, in competition fora… … hakrison (1693-1776) Telescopes and Houses for Them 373 voyages, actually finding the longitude with a precisioneven greater than the margin stipulated, and in 1765he was paid the reward, — but only half of it, becausethe prize was divided between him and the brilliantTobias Mayer, of Gottingen,…
Astronomy
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