An 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 Measuring Minute Quantities Volume 99 1809 [LeatherBound]
Edward Troughton
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