Celestial scenery, or, The Wonders of the planetary system displayed : illustrating the perfections of deity and a plurality of worlds (1845)
Dick, Thomas, 1774-1857, Parker, E. S., former owner. DSI, David H. DeVorkin Collection (Smithsonian Institution. Libraries) DSI · Philadelphia : Published by Edward C. Biddle · leaf 127
rs, thirty-nine minutes ; onlyone minute less than as Cassini had determined it. This ap-pearance of Mars is represented in Fig. XXXVII. On the27th of August, 1719, the same observer, with a telescope ofthirty-four feet in length, perceived, among several other spots,a long belt that reached about… … The following figures represent the appearance of the spotsas seen by Dr. Hook in 1666. He saw Mars on March 3,1666, as represented in Fig. XXXIX., which appearance wastaken down at the moment of observation. On the 23d of thesame month he perceived the spots as delineated in Fig. XL.,which appears…
Astronomy
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