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"Determination of the Solar Parallax and Mass of the Moon" being two mammoth hardbound volumes summa

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 Determination of the Solar Parallax and Mass of the Moon  being two mammoth hardbound volumes summa
"Determination of the Solar Parallax and Mass of the Moon" being two mammoth hardbound volumes summarizing observations made in 1888 and 1889 by the observatory at Cape of Good Hope and at Yale including observations of the minor planets Iris, Victoria and Sappho. There are a total of about 1600 pages in all. Filled with detail, mathematics, tables, drawings and more. A fantastic duo the like of which we have not seen before. Covers are worn with some water stain but pages themselves are excellent. Prepare for weight as these are very hefty, to say nothing of being quite valuable.