A handbook on the teeth of gears, their curves, properties and practical construction
A technical handbook by American gear manufacturer George B. Grant, published in Boston in 1885 for machinists and draughtsmen laying out gear teeth. The plates are line diagrams of tooth profiles overlaid with dashed pitch arcs, radial construction lines and italic letter keys, offering geometric outlines, lettered annotation styles and curve-tracing linework for diagrammatic design.
