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Book shows considerable wear to covers in heavy red cloth with black print. Binding is solid and square, worn corners. Text/interior is clean and free of marking of any kind. 524 pages of devices with fine line, b&w illustrations , fine print and prices. A trade catalog from L.E. Knott Apparatus Company of Boston presenting scientific instruments and laboratory equipment for physics, chemistry, and school science, illustrated with descriptions and prices of glassware, optical instruments, electrical apparatus, measuring devices, Geissler tube rotators, Unequally evacuated geissler tubes, Oersted's law apparatus, Paramagnetic and diamagnetic study apparatus, One hundred volt lifting magnet, Dynamos and motors, Artificial telephone lives, Selenium cells, etc. Keywords: L E Knott Boston, Laboratory Equipment, Physics Apparatus, Chemistry Equipment, Early 20th Century, Scientific Glassware, Optical Instruments, Measuring Devices, Trade Catalog, School Science, Electrical Apparatus, Laboratory Supply 2.
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