In this astronomical chart (front and back) on the front of the page Gibbes provides a diagram and the elements for constructing the diagram. Also included are his calculations of the partial lunar eclipse including the hourly motion, declination, hourly motion in declination, horizontal parallax, and semidiameter. Gibbes also provides the results of the eclipse (phases of the eclipse: beginning, middle, end and duration). On the back of the page Gibbes provides the calculations from the quantities given on the front page to calculate logarithms, the auxiliary quantities, and relative orbit described by the moon in one hour of time.
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Lewis R. Gibbes Papers, 1800s-1893, 1937✖[remove]1
