Date JJue 



OCT 1 9 



MJ. 



1950 



mt 



WovS-g^M" 



^Qct2CS^A 



li/lay:K) '■ ■^' 



lavvi 



rt^* 



B"^nv7'; »9K 



- Ja n 5"''6 G 



— nw>wmimniD»n« pi 



Cornell University Library 

 QK 45G77ln 1857 



Introduction to structural and systemati 



3 1924 001 719 321 



