Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 471
Fig. 1068. … ENGINEERING DRAWING. 455 Fig. 1071 is a drawing, in outline, of the hollow quoin of the lock-gate, ona scale of -^ full size (Chemung Canal). ^ V -»r-
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
