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 UNITED STATES OF AMERICA. 
 
 
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MECHANICAL GRAPHICS. 
 
MECHANICAL GRAPHICS. 
 
 AN EDUCATIONAL COURSE ON 
 
 THE THEORY AND PRACTICE OF MECHANICAL DRAWING. 
 
 FREDERICK NEWTON WILLSON, C. E., 
 
 ^rofes^or of Dc^criptke Geometry, Stercotomy and Technical Drawing 
 
 i7i the 
 
 John C. Green School nf Science, Princeton, N. J. 
 
 r 
 
 
 ADVANCE SHEETS OF ILLUSTRATIONS PRINTED FOR THE CLASS OF '94. 
 

 Copyright, 1890. 
 
 BY 
 
 FREDERICK N. WILLSON. 
 
 THE PRINCCTON PRESS 
 
 C. S. ROBINSON &, CO., UNIVERSITY PRINTERS, 
 
 PRINCETON, N. d 
 
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is'x Mo' COVER PLATE 
 
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 Railrnad Bridge 
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 Upper Clinrd, 
 
 (In drawing llie above the student will make horizmtal, not slanting dividing lines in all fractions. Centre and dimension linos iii conlinuons red linos, 
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CFHE remaining plates present a large number of examples that will be serviceable to the 
 draughtman in the designing of titles for maps and other drawings. They are specimens of 
 the type'-founder's art, procured for, though not designed with especial reference to, this work. 
 
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