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細節
BARLOW, William (1544-1625). Magneticall Aduertisements: or Divers Pertinent obseruations, and approued experiments concerning the nature and properties of the Load-stone... most needfull for practise, of trauelling, or framing of Instruments fit for Trauellers both by Sea and Land. London: Edward Griffin for Timothy Barlow, 1616.
Small 4° (175 x 142mm). With the errata leaf. Printer's woodcut device on title [McKerrow 380], woodcut diagrams. (Title soiled and with a very small hole, pen trials and small ink stain, early repair in the margin of B3 and D2, occasional dampstaining and soiling.) 19th-century calf, sides panelled in gilt (rebacked, extremities rubbed, corners lightly scuffed). Provenance: ‘Mr. Marshall, his book’ (inscription in an early hand on title verso) — (19th-century manuscript biographical note on endpaper) — purchased by the Royal Institution on 3 March 1829 for 10s 9d.
FIRST EDITION of Barlow’s important findings on the properties of the compass-needle. Barlow prints as an appendix a letter from Gilbert discussing their shared ideas, and praising Barlow’s achievements. The Oxford English Dictionary credits Barlow with the first use in English of the word ‘magnetism’. Barlow ‘designed navigating instruments, polar charts, and compasses. He explained the difference between iron and steel needles; improved the needle's shape; made an easily removable card so the needle could be easily remagnetized; gave instructions as to the best method of remagnetizing the needle by stroking it with the lodestone three or four times from the needle's center to the ends, using the north end of the lodestone for the needle's north end, and the south for the south. He also designed an azimuth compass for measuring the variations which happened to be an improvement on the instrument designed by Norman and Borough; it was a compass with sights and a verge ring marked in degrees, the first such compass, and was to be used by grateful seamen for over two hundred years’ (Gurney, Compass, a Story of Exploration and Innovation, p.64). Horblit 83; STC 1442; Taylor Mathematical Practitioners 129; Wheeler Gift 89.
Small 4° (175 x 142mm). With the errata leaf. Printer's woodcut device on title [McKerrow 380], woodcut diagrams. (Title soiled and with a very small hole, pen trials and small ink stain, early repair in the margin of B3 and D2, occasional dampstaining and soiling.) 19th-century calf, sides panelled in gilt (rebacked, extremities rubbed, corners lightly scuffed). Provenance: ‘Mr. Marshall, his book’ (inscription in an early hand on title verso) — (19th-century manuscript biographical note on endpaper) — purchased by the Royal Institution on 3 March 1829 for 10s 9d.
FIRST EDITION of Barlow’s important findings on the properties of the compass-needle. Barlow prints as an appendix a letter from Gilbert discussing their shared ideas, and praising Barlow’s achievements. The Oxford English Dictionary credits Barlow with the first use in English of the word ‘magnetism’. Barlow ‘designed navigating instruments, polar charts, and compasses. He explained the difference between iron and steel needles; improved the needle's shape; made an easily removable card so the needle could be easily remagnetized; gave instructions as to the best method of remagnetizing the needle by stroking it with the lodestone three or four times from the needle's center to the ends, using the north end of the lodestone for the needle's north end, and the south for the south. He also designed an azimuth compass for measuring the variations which happened to be an improvement on the instrument designed by Norman and Borough; it was a compass with sights and a verge ring marked in degrees, the first such compass, and was to be used by grateful seamen for over two hundred years’ (Gurney, Compass, a Story of Exploration and Innovation, p.64). Horblit 83; STC 1442; Taylor Mathematical Practitioners 129; Wheeler Gift 89.
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榮譽呈獻
Julian Wilson