c*«^/c 





















CABOT SCIENCE LIBRARY 



HARVARD COLLEGE, CAMBRIDGE, MA 02138 

 (617) 495-5355 



Borrowers are responsible for the proper care and timely 

 return of Library materials. Please return this item directly 

 to Cabot by the date stamped below to avoid fines. A full 

 policy statement is available at the Circulation Desk. 



i^vC. <r'c:c., c^£i_^ . c^^c ^ 









. «C C c cr , 



CC r - 

 c c . 



^.cx < c c^p^c C c- c; 01 



<xcc c. '<^cs. c:r<c-, 



2'CCC c<^ -^^- <^'^ C C <j<}. 

 ^C CC r, c c^tl «r , c . ( C'f 



CCOC'CC 



C CCC c ^ ( 



C (CC' c c c 



