^^2DJU 



— ^^^-^^ — 





>nij?>::>" 













•«eyMJi. 



liDi] 





66'4 





•^ I 



§3 SCIE NTIFIC Library cs 



.. I 



OOTBKKMBfT rBlNTING «mOS 1 1 8625 



UNITED STATES PATENT OFEICE 



>J 



i^>ax) 











i^r^i^jj-i 



p> s^jjtav^ 



i@^^ 



