Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 300
s ground to a straight edge by rubbing it forward and back- LEATHER-WORKING TOOLS—CURRYING. 287 ward on the rub-stone, which is a block of sandstone placed on a strong trestle of convenient height.The upper surface should be a perfect plane. Hub-stones of Nova Scotia sandstone are cylindrical,about… … man then takes a turning-steel, and by rubbing it carefully from end to end turns the edge complete-ly over. To keep the knife in this condition requires the greatest skill, as it cannot be used formore than a minute without losing its keenness. To restore this, the point of a small steel…
Mechanical engineering -- Dictionaries
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