. 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 trasses 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 trasses 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
