[Astronomy] George Philip & Son
Philips' Planisphere Showing the Principal Stars Visible for Every Hour in the Year
Lithographed circular star chart mounted on a moveable board disk within die-cut overlaid frame of gilt-stamped straight grain morocco covered board, printed paper explanation label on verso. 10x10 inches; light wear. London: George Philip & Son, circa 1880.
Simple and graphically striking device for the recognition of the brightest stars and constellations seen from a given latitude. The days of the year are marked on the outer portion of the star chart and hours of the day and night along the edge of the overlay. The stars visible at a particular date and time can be seen through the elliptical aperture in the overlay by aligning the disk and overlay accordingly.
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