Triumphs and wonders of the 19th century, a volume of original, historic and descriptive writings showing the many and marvellous achievements which distinguish an hundred years of material, intellectual, social and moral progress (1901)
Boyd, James Penny, 1836-1910 · Philadelphia, A. J. Holman & co · leaf 113
atfor this computation the best available instruments were the chronometersof a century ago, and that lunar observations were made with the old-timesextant. LofC. 100 TRIUMPHS AND WONDERS OF THE XIXth CENTURY As applied to geodesy, astronomy has added a process of ascertaining geo-graphical… … 7.1.MTH TELESCOPE.Made for University of Pennsylvania by Warner & Swasey. nately to two stars that cross the meridian at a brief interval of time, the onenorth and the other south of the zenith. Difficulties that arise from refrac-tion are avoided, and the resulting latitude is quickly…
Progress · Inventions
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