The Engineer's Sketch-Book, by Thomas Walker Barber 58391 [Subtitle: Of Mechanical Movements, Devices, Appliances, Contrivances And Details Employed In The Design And Construction Of Machinery For Every Purpose Classified & Arranged For Reference For The Use Of Engineers, Mechanical Draughtsmen, Managers, Mechanics, Inventors, Patent Agents, And All Engaged In The Mechanical Arts] [Link: http://www.gutenberg.org/5/8/3/9/58391 ] [Files: 58391-0.txt; 58391-h.htm] Thanks to Chris Curnow, Harry Lamé and the Online Distributed Proofreading Team at http://www.pgdp.net (This file was produced from images generously made available by The Internet Archive) David