e observatories here almost entirely Wilkes' successor, and Prof. Bond of until 1842. Cambridge. An achromatic telescope was Pew visitors to Washington in the added to his equipment by the Navy early days of the past century did not Department and for four years Lieut. have pointed out to them from… … FART OF THE GREAT EQUATORIAL. ONE OF THE SMALLER TRANSITS. ) 1902 SCIENTIFIC AMERICAN, INC.
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