Ale in London

1852 Scientific American  
curved line over the stone in such manner and by such means that the convex side of such curved line is the projecting or boundary of the undressed portion of the surtace, and the concave side of such curved line so described by the cut of the cutter, is the edge of the dressed portion of the surface when it meets that part which is undressed. The cutter, by the improved arrangement, as it approaches and leaves the stone in such curved line as
doi:10.1038/scientificamerican04241852-250d fatcat:cm25qsi44ffypn6jwruaapxlju