Dating spencer microscopes

I was given this magic lantern whilst giving a magic lantern slide show using the one above for which I have constructed an electric radiant using a 5W LED 50W halogen equivalent spotlight bulb. This one is a more basic japanned tinplate lantern. It is early 20 th century and probably had an oil radiant originally which has been replaced in around the s or possibly later with a proprietary electric V W bulb radiant. This would need to be re- wired before it could be used so the bulb holder and bulb have been replaced with new items. It has a simple two slide, slide carrier, that appears to have been modified with added wood verticals to fit the aperture in the lantern.

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Antique 1909 Spencer Brass Microscope W/case; Spencer Lens Co. Buffalo Ny. Usa

Mammoth bones and 'ghost' footprints add to heated debate about first humans in North America

Effective date : A microscope illumination system having a zoom unit located before the field diaphragm is useful to provide maximum illumination for objectives from 10 to X, when using a suitable condenser, without the disadvantages of other systems. The zoom unit comprises a positive lens, a negative lens and a positive lens in series with the two positive lenses connected together and movable with respect to the negative lens along the optical axis as a unit. O United State 3,,

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Epidemiologic and Clinical Characteristics of Monkeypox Cases — United States, May 17–July 22, 2022

Microscopy is the science of investigating small objects and structures using a microscope. Microscopic means being invisible to the eye unless aided by a microscope. There are many types of microscopes, and they may be grouped in different ways.

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