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Astronomical instruments: achromatic telescopes and dynameters.. Astronomical instruments- achromatic telescopes and dynameters. Copperplate engraving by Wilson Lowry after a drawing by J
Transit instruments for moving astronomical instruments.. Transit instruments for moving telescopes and other astronomical instruments. Copperplate engraving by Wilson Lowry after a drawing by J
Zenith sector telescopes.. Zenith sector telescopes by astronomical instrument makers George Graham, Jesse Ramsden and John Dolland. Copperplate engraving by Wilson Lowry after a drawing by J
Universal equatorial instrument by Edward Troughton, . Universal equatorial instrument by Edward Troughton, English maker of astronomical instruments
Edward Troughtons mural circle.. Edward Troughtons mural circle. He was an English maker of astronomical instruments. Copperplate engraving by Wilson Lowry after a drawing by J. Farey Jr
Whirling table to demonstrate centrifugal force.. Whirling table to demonstrate centrifugal force, and other astronomical instruments
Circle by the Reverend Francis Woollaston.. Circle by the Reverend Francis Woollaston, English astronomer 1731-1815. Copperplate engraving by Wilson Lowry after a drawing by J. Farey Jr
Portable circle by Edward Troughton.. Portable circle by Edward Troughton, English maker of astronomical instruments. Copperplate engraving by Wilson Lowry after a drawing by J
Josef de Mendoza y Rioss refinement to the reflecting circle.. Josef de Mendoza y Rioss refinement to the reflecting circle, an astronomical instrument, 1801
Repeating circle without reflection by Edward Troughton.. Repeating circle without reflection by Edward Troughton, English maker of astronomical instruments
English reflecting circle by Edward Troughton.. English reflecting circle by Edward Troughton, maker of astronomical instruments. Copperplate engraving by Wilson Lowry after a drawing by J. Farey Jr
Astronomical circles invented by Tobias Mayer and Borda.. Astronomical instruments- Tobias Mayers reflecting circle of 1752 and Jean-Charles Bordas improved version of 1777