EditorialCharles Darwin's microscope. A Treatise on the Construction, Proper Use, and Capabilities of Smith, Beck, and Beck’s Achromatic Microscopes. J. van Voorst: London, 1865. BECK, Richard, Optician. Source: 8715.f.19 page 102. Language: England.
EditorialAstronomical instruments: achromatic telescopes and dynameters. Copperplate engraving by Wilson Lowry after a drawing by J. Farey from Abraham Rees' Cyclopedia or Universal Dictionary of Arts, Sciences and Literature, Longman, Hurst, Rees, Orme and Bro...
EditorialTHE TRANSIT INSTRUMENT. IT CONSISTS OF AN ACHROMATIC TELESCOPE, TO WHICH IS FIRMLY FIXED A DOUBLY CONICAL AND HORIZONTAL AXIS, AT RIGHT ANGLES TO THE OPTICAL AXIS OF THE TELESCOPE.