![]() Its product range by this point included several optical instruments besides microscopes. Paul Ehrlich, inventor of chemotherapy, received the 150,000th one, and Nobel laureate Gerhard Domagk, discoverer of sulfonamides, the 400,000th Leica instrument.īy the end of the 19th century, the company had a worldwide reputation. Bacteriologist Robert Koch was given the company's 100,000th microscope in 1907. In 1887 the 10,000th microscope was shipped, four years later the 20,000th, and in 1899 the 50,000th was completed. By 1880, the company had reached an annual production numbering 500. Leitz microscopes improved on other models of their day in several ways, including lighting and optics, particularly with orthoscopic eyepieces. ![]() The microscopes were produced for biomedical as well as industrial purposes, including mineralogy. ![]() Consulting with his clients, he continued to refine the microscopes to their needs. #Leitz wetzlar germany microscope 561579 serial#Leitz introduced serial production, raising sales volume rapidly after 1871. Initially, Leitz was a part shareholder of the business (in 1865), but took over as sole owner in 1869 and continued it under his own name. He was trained as an instrument maker for physical and chemical apparatus and had several years' experience making watches in Switzerland. (1843–1920) from Baden arrived at Wetzlar in 1864 and entered service at the Optisches Institut. Following his early death on, his widow continued the business he had left behind, the "Optisches Institut" (optical institute). #Leitz wetzlar germany microscope 561579 free#The ocular was capable of rendering an image with the correct perspective, free of the distortions typical of other microscopes at that time. 1922.Perea-Borobio CollectionĬarl Kellner, mechanic and self-taught mathematician, published his treatise Das orthoskopische Ocular, eine neu erfundene achromatische Linsencombination ( The orthoscopic ocular, a newly invented achromatic lens combination) in 1849, describing a new optical formula he had developed. H.E F.Leitz compound monocular microscope. One is marked, "DOG / #473 / 6 m," and the other is marked "aortic / essaft / 70% IMO. Two boxes of cover slips, partly used, were made in the USA.Īlso found in the case are two laboratory prepared slides with stained specimens. 52." There is a glass oil dropper bottle of clear and amber glass. The handle is missing.Īccessories in the case include a bottle of immersion oil (n/D = 1.515, v=49). It has metal corner protectors and three latches. The fitted case is made of wood, covered in leatherette, and lined with a deep burgundy felt. The canisters are all present and marked. There is also one Bausch & Lomb 10x eyepiece. There is an unsigned 10x wide angle, a 10x, and an unmarked eyepiece. The last two are stored in a tall, plastic jar with a screw lid. The base has a plano-concave mirror.Įyepieces include a pair of Periplan 10x, a 10x B, and a 6x B, all Leitz. The condenser is mounted on a vertical frame that can be adjusted up and down by rack and pinion. There is also a removable iris diaphragm and a swing out glass filter. The substage illuminating apparatus includes a condenser with a small swing-out lens in addition to the large central lens. Adjustments in x-y directions are made by a two nickel knobs mounted concentrically on the same axis. The square mechanical stage has two verniers. The coarse and fine focuses appear to be made of nickel. There is a chrome-plated quadruple, revolving nosepiece. The interpupillary distance is adjustable by means of a calibrated knob. The end of the arm carries an inclined binocular tube marked 1.25x. The arm is a curved handle attached to an upright rectangular support that carries the rack and pinion and focusing knobs. It has a modern, inclinable stand with a V-shaped cast-iron base. Description This is a Leitz laboratory binocular compound microscope of the LMBI-T design.
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