An account of a method of dividing astronomical and other instruments, by ocular inspection : in which the usual tools for graduating are not employed / [Edward Troughton].

  • Troughton, Edward.
Date:
1809
Catalogue details

Licence: Public Domain Mark

Credit: An account of a method of dividing astronomical and other instruments, by ocular inspection : in which the usual tools for graduating are not employed / [Edward Troughton]. Source: Wellcome Collection.

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    ACCOUNT - . ' / ■ / OF A METHOD OF DIVIDING ASTRONOMICAL AND OTHER INSTRUMENTS, BY OCULAR INSPECTION; IN WHICH THE USUAL TOOLS FOR GRADUATING ARE NOT EMPLOYED; THE WHOLE OPERATION BEING SO CONTRIVED, THAT NO ERROR CAN OCCUR BUT WHAT IS CHARGEABLE TO VISION, WHEN ASSISTED BY THE BEST OPTICAL MEANS OF VIEWING AND MEA¬ SURING MINUTE QUANTITIES. BY Mr. EDWARD TROUGHTON. FROM THE PHILOSOPHICAL TRANSACTIONS. LONDON: PRINTED BY W. BVLMER AND CO. CLEVELAND-ROW, st. James’s. 1809.