A22-I- 
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CORNELL 
 
 UNIVERSITY 
 
 LIBRARY 
 
 ENGIN££R/NG UBRARY 
 
3 1924 003 951 591 
 
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 Cornell University 
 Library 
 
 The original of tiiis book is in 
 the Cornell University Library. 
 
 There are no known copyright restrictions in 
 the United States on the use of the text. 
 
 http://www.archive.org/cletails/cu31924003951591 
 
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