0 
a/*" « 
. \ 
Harvard University, 
Cambridge, Mass. 
. /9 189 c? 
V 
(^Cc 
^ "" 
^ — ■ 
» '•'7 
— 1--<— -'■^^..-'-^^-'■^..^c....'<~..<^.‘^^ o2. 3 * 
