Carl Zeiss Brass Microscope no. 42798, c.1906
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COLLECTOR'S ITEMCarl Zeiss Jena microscope number 42798Made circa 1906Complete with numerous accessories Stand IIIEObject Stage: Large mechanical stage E (providing left-right and up-down movements). Objective lenses:Acromat AA number 9972Achromat DD number 10881Homog Immersion 1/12", N.Aperture 1.30, number 11596Apochomat 20 0.65 0,17 number 104654 (of more modern date)Parachromatic condenser lens 2/6" 1.0 N. aperture (by W. Watson & Sons Ltd, London)Condenser fitted with iris diaphragm aperture control marked in ten steps from 0.1 to 1.0 N.A.Eyepieces:Number 2Number 4 (x10)Periplan OK (x25) by Ernst Leitz, Wetzlar.Two-sided mirror (one flat, one concave).Various brass cases for objective lenses.Classic Zeiss wooden case with lock (key missing) and handle.Also has slide-out wooden carrier for eyepieces, and slide-out wooden box. Various Carl Zeiss microscope accessory catalogues circa 1922, namely:"Selection of Zeiss accessories for the microscope" with prices (16 pages)"Dark Ground Illumination with the Seidentopf Paraboloid Condenser" instructions (8 pages)Ditto "Price Slip" (1 page)"Price list for Haemacytometers" (1 page) Delivery note covering the sale of this microscope second hand in August 1931. Also a wooden stand with 60 watt bulb and rheostat providing artificial light source for the microscope (date of this is unknown)
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