. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Smithsonian Report, 1910.—Beyer Plate View in Nail Mill. Showing Safety Hoods Over Emery Grinders, which are Flanged Out of a Solid Piece of Steel Plate. The foot treadle must be held down while the grinder is being used; as .soon as the treadle is released a spring throws the overhead belt on to the "loose" pulley, stopping the grinder automatically. Walks for oilers will be noted in the trusses at the top of picture; in this
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. Smithsonian Report, 1910.—Beyer Plate View in Nail Mill. Showing Safety Hoods Over Emery Grinders, which are Flanged Out of a Solid Piece of Steel Plate. The foot treadle must be held down while the grinder is being used; as .soon as the treadle is released a spring throws the overhead belt on to the "loose" pulley, stopping the grinder automatically. Walks for oilers will be noted in the trusses at the top of picture; in this case they are fenced in with boards, although pipes or structural railings are frequently Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Board of Regents; United States National Museum. Report of the U. S. National Museum; Smithsonian Institution. Report of the Secretary. Washington : Smithsonian Institution
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
