112 



THE UNIVERSITY SCIENCE BULLETIN. 



&}! H 



O QOii^OS ■^COu^ OOOTt« (Mt^Ui 

 C5 lOCOM C^'^'^ COtJ^CO COfOCO 



t^iO-^ 40'-^M (MCOiM 



^ ) ^_-H (^jvjj^ co-^-^ r-u5«o t--.ooo 



t^ 



CO cc Oi cci Oi 1^5 fc 00 o OS O cc cc c^ Tj< lo o r-- ocoooo 



ciOCOCO l-^t^OO wiOOOi OOOIOS CiOlOl 0;iOlOi dOiC". 



w 

 hJ 

 « 



< 

 H 



ir? lO m CO -M o 



o o t— en as »o CO r- -^o -^ rr -rf -^ ■^ »o -^ rf to 



00 ■^ CO CO O ^ O O CO CO ■^ C^ CO ■* CO 00 OD oo 



CDOO ooo ooo ooo ooo ooo 



1— « C^l CO "* »o CO 



t^OOOi O — C-1 CO"*u^ ccr-00 cr. O ~^ C^Jro*** 



