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Title: Circular slide rule, 1660-1680. [Go to resource]
Description: Circular slide rule, boxwood, 6-inch diameter 3/8-inch thick, with two brass radial arms and an astronomical quadrant engraved on the back, ascribed to John Brown License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: circular slide rule Temporal: 1660-1680 Source: Science Museum Creator: Brown, John Identifier: http://collectionsonline.nmsi.ac.uk/grab... Go to resource More Like this...
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