Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 737
In 1820, Mr. James Allan was rewarded by the Board of Longitude with one hundred pounds,for his improvement on Ramsdens dividing-engine. This improvement consists in the method em-ployed to cut or rack (lie teeth around the periphery of the great circle, worked by an endless screw,upon which the…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
