Details
A rare 18th-Century brass Francis Watkins-pattern simple microscope,
signed on the baluster shaped octagonal section pillars Mordechay Semah Aboab inv: et Fecit Amsterdam, with folding tripod stand, the limb supported by a compass joint, (mirror missing), friction adjusted clip-stage, the upper plate with fixing for the six simple lenses, focusing by internal screw, with two ivory sliders and tweezers, in plush-lined rayskin-covered case -- 4 3/8in. (11.1cm.) wide
See Colour Plate 16
signed on the baluster shaped octagonal section pillars Mordechay Semah Aboab inv: et Fecit Amsterdam, with folding tripod stand, the limb supported by a compass joint, (mirror missing), friction adjusted clip-stage, the upper plate with fixing for the six simple lenses, focusing by internal screw, with two ivory sliders and tweezers, in plush-lined rayskin-covered case -- 4 3/8in. (11.1cm.) wide
See Colour Plate 16
Literature
G.G.L'E. Turner: The Great Age of the Microscope pp 262-264