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Pocketmags Digital Magazines
Pocketmags Digital Magazines

Logarithms that add to trigonometry study

Sold for £1100 by Chiswick Auctions (23% buyer’s premium) on September 27 was a copy of the posthumously published, 1633 first of Henry Briggs’ Trigonometria britannica….

Catalogued as an important work outlining the applications of logarithms to trigonometry, it has also been described – for those more mathematically at ease than I, as “…a table of logarithmic sines and tangents for the hundredth part of every degree to 14 decimal places, a table of natural sines to 15 places and the tangents and secants for the same to 10 places”.

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About Antiques Trade Gazette

Published every week since 1971, Antiques Trade Gazette is affectionately known as ‘the Bible of the antiques trade’. A long tradition of authority, integrity and accuracy, makes it the essential read for everyone who loves antiques. With a subscription to Antiques Trade Gazette, you’ll stay ahead of all the developments in the art and antiques market, plus you’ll enjoy • A comprehensive auction calendar – see when and where every sale will be happening • Exclusive interviews with dealers, giving you the inside track on the trade • Breaking news on key industry developments • Secrets, stories and tips from leading specialists and collectors • Top lots advertised by auctioneers • Previews of the best art and antiques fairs and markets • Special supplements focusing on specific collecting areas

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