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The Fair featured manufacturers of microscopes for all purposes and auxiliary optical and mechanical accessories. The company offered photometers, telescopes, prism binoculars, photographic lenses of all types, and optical elements in every form. W. Watson & Son exhibited in the Olympia Room, Ground Floor at Stand No.
Slate is a fine-grained, foliated, homogeneous, ... Under a microscope, the slate is found to consist of very thin lenses of quartz and feldspar (QF-domains) ...
The compact variety of pyrophyllite is used for slate pencils and tailors' chalk (French chalk), and is carved by the Chinese into small images and ornaments of various kinds. Other soft compact minerals ( steatite and pinite ) used for these Chinese carvings are included with pyrophyllite under the terms agalmatolite and pagodite .
Leica Microsystems GmbH is a German microscope manufacturing company. It is a manufacturer of optical microscopes , equipment for the preparation of microscopic specimens and related products. There are ten plants in eight countries with distribution partners in over 100 countries.
A petrographic microscope, which is an optical microscope fitted with cross-polarizing lenses, a conoscopic lens, and compensators (plates of anisotropic materials; gypsum plates and quartz wedges are common), for crystallographic analysis. Optical mineralogy is the study of minerals and rocks by measuring their optical properties.
In optical mineralogy and petrography, a thin section (or petrographic thin section) is a thin slice of a rock or mineral sample, prepared in a laboratory, for use with a polarizing petrographic microscope, electron microscope and electron microprobe. A thin sliver of rock is cut from the sample with a diamond saw and ground optically flat.
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