His later microscopes used a draw-tube coarse focus and a knob controlled fine focus. Made of brass, many of these instruments had a black japanned base. Initially building single lens instruments, in 1857 his firm began designing compound microscopes. The German lens maker, Carl Zeiss, excelled at crafting precision lenses and began manufacturing microscopes in 1847. Instruments manufactured in the 1800’s are the oldest an antique microscope collector can hope to acquire.įor further history reading feel free to follow our link on the History of the Microscope. Note:įor different types of illuminating apparatus, we refer to page 114.How To Maintain Your Retro Computer: 5 Tips for Longevity 2000 ( listed on page 114).Ĭabinet-Mahogany wood, with lock and key. Illuminating Apparatus-Two-iris-diaphragm type, model "a" with " Ahrens" prism and five-lens condenser No.
Objective Clutch Changer-Of new and patented design for objectives objectives remain individually and permanently centered. Ocular Adapter-To permit the use of ocularsand tube accessories of small diameter.
Wright, adjustable by rack and pinion.Ĭap Analyzer Support Serving as socket for the top analyzer to rest on, provided with index line.
Tube Analyzer-Anastigmatic type with "Ahrens" prism.Īmici-Bertrand-Lens-In centering mount with iris diaphragm, attached to slider, after F. Micrometer Screw-Of patented design, making use of ball bearings at the sliding surfaces whereby lost motion is eliminated completely and the mechanism acts entirely independently of lubrication one head of the micrometer screw is equipped with divided drum for depth measurements and since one interval at the drum equals 0.002mm, measurements are possible within this minute ratio. PETROGRAPHICAL MICROSCOPE "CM" Wide Tube for Oculars of Large Diameter) Object Stage-Of rotary pattern the periphery of the stage is furnished with scale and double vernier permitting readings within 0.1° the stage is furthermore equipped with a removable ring plate and may be clamped in position at any desired orientation two stage clips are furnished.
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