Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 46
APPEARANCE OF MARS, 1852, FEBRUARY 3, 6 H. 50 M., Greenwich Mean Time. Power of Telescope, 242 and 358 on 6 1-3 inchobject-glass. … APPEARANCE OF MARS, i860. JfLV 6, Greenwich Mean Time. Power of Telescope, 201; 8 1-4 inch object-glass-Planet very low, yet pretty distinct. and I tenth of a second. We, taking the ordinaryday as the time of a turning or rotation, lose countof one rotation each year. It is necessary to men-tion…
Children's literature
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