2 December 2010
RIDLEY, Mark (1560-1624). A Short Treatise of Magneticall Bodies and Motions. London: Nicholas Okes, 1613.
Small 4o (170 x 126 mm). Engraved title by Renold Elstrack (Johnson p.15), engraved portrait, 21 engravings in text (one with two maps showing New England, Virginia and Terra Australis), printer's woodcut device on last leaf X3, (without the volvelle and final blanks, cropped occasionally affecting headlines and text at foot.) Modern red morocco; quarter morocco folding case. Provenance: Robert Dunham (pencil inscription on front pastedown; sold Sotheby's New York, 11 December 1993, lot 764).
FIRST EDITION, second issue, with the errata on X3r; containing also the Tixover advertisement on X3r. Ridley, following William Gilbert's work De magnete, "here presented directions for a series of experiments on the lodestone, magnet, and terella which could be carried out by anyone interested in the subject. He added engravings and descriptions of his improvised instruments for determining the variation, and for making use of the inclinatory needle for finding position at sea. This was in accordance with the method published jointly by Edward Wright, Thomas Blundeville and Henry Briggs" (Taylor). Johnson Astronomical Thoughts in Renaissance England 235-38; Mottelay Bibliography of Electricity and Magnetism 97; Sabin 71297; STC 21045; Wheeler Gift 86.
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