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Amici Achromatic Microscope

Giovanni Battista Amici introduced his first achromatic microscope lens system in 1827, following the work of John Dollond. The microscope illustrated below was introduced in a variety of different configurations starting in 1850.

This achromatic microscope has the unusual feature of a quad-eye tube head that allows four individuals to simultaneously view a specimen. The head/body/objective combination is secured in a circular clamp to the main limb of the microscope at a 45-degree angle. Focus is achieved with a rack and pinion mechanism activated by a knurled knob to move the stage up and down while the rest of the microscope remains stationary. Beneath the circular stage is a condenser lens and a plano-concave mirror both of which have some degree of adjustment. Amici also offered models that sported both monocular and binocular heads, as well as several different objectives.

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