42 



THE UNIVERSITY SCIENCE BULLETIN. 



C3 



"Sb 



2 g 



Ah 



-a 





(M ^H ^ 



00 ■-*< iC ■^ OliO CC.OO OOOCOCO<MOtJhC^OO"^CO 

 "Tj* t-^ 1:0 CO -^ CO 0.>f 00'*'»-'»^OiO lO-^i-H 



r>- CO -— I —' CO »o 



CO^'— 'lOCO't'O-^Tt'C^'— ' 



— ' (Mcor^co'-''— ' 00 



OOCitOcDCi'— •'— 'Cr-tOcDO-^OOr^'Ol-^COO-— 'OOiCD'— >— 'COCCOOO^^O 

 O ■^ <C CO -^ 1-H Oi 0000000 1— < -Tf to '-« CO CO t- O CO -^ -rt* 00 >— ' 

 t-it^»0'-' "^ O^JCO u^ O CO CI 



■^COCOClOOCOC^r^COt^COrfOlu^cOCSCOCMC^iO'— 'O— '»0(MCO'^'— 'CO<^ 



^00eOl>'"rt<'— iCOOOdC^-tfOtOt^-cOCOt^ O— 'CO -rfl^ CiOlrfCO-^ 



CM C^ i-f 05 (M T-i »C f-i t^ -^ t- 



CTscO^OiCOI>-a:«0'— i-rt<^C^C0"rt'00I^C0C^t~-'^OO<:0'M00Crs->*<^C5O 



COC^ICMOCO"— '■^^CO^M-rH'^OOOOt^Csr^iOt^'^'OOOO^^'MOt^cOiO^O 

 <— t'Mt^I>-rfCO*0'— 'Oi t^ft^OOO-— 'OOir^t^cO Clt^C^l"— '05 >— i(M 



OlOOTldO'— 'OOiCOTfi'-'C^'^COCOOCO^^'^O-JOCi'^OC^lCO— 'to— «CC 

 t-'.'MCO'MCOCO'— ' 'MT'I ■— ' UOC;OCOOC1--0 — rfCO t^COCOt'-tOir; 

 ,_,— « T-H,-« C^IC^ CO »-''-Hi— iOI>.COOI>. C^ Ol ■— I 



Or^COt^OOd'^OtOCOOOO'M'^OOCOOOlOM'Tj-OOOCOCOOt^OCOr— •—"*—' 

 r-*CC»O000CO OCr-TfOOCOTJ'M .— 'CSCiC^ltO'MdTt"— lOO ■^t- ^ 



^^_H— . (M »o •— '■— 'OO iTJCOCSiO^^O CO CO 



iDOOGor^oioooO':o»o<^'--''X>oo':M'MiOTpooo5cno-^fO'— '»0!0-^co 



He 1>-OOOOCO C^IOOUO 00 CO TjifMr-.-^jHCOOSt^CO-^O-rf'— "O'^— ' 

 CO-— I 00 CO (^ITP^^O C-JCO'—iO'— ' 



cooooO'MTf'-ooco*MO'^cocooooooO'*fr-— 'toioco'— ''£>'rjcooo— ' 



COiO tC'^iC'— 'OS (Ml— '"rf<cor^ OO*— ' i?^COO '^OO t>.iOCO 



^OcoOOOOiC-— 'COOOOCO-^C^ '-'OOOOOOCO'-<<MO'^Tt<COCi'Mt-00-H 



i— iiO"— ' COM''— ' -^lOOiOir^io comtjhi— (irsc^aat^oco »o(M 



cor-c^iococoooooocooo^oocococooco— 'OfMuoo— I'j^inooO"^'— ' 

 T-HOiooc-i looor'- r-iOTf'— tt-^ioocococ-i oO'^'MOi-^ooor*^- 



l>. (Ml— I— « !>.,—.,—( lO 1— 'CO'M'— 'CO*— ''— • 



<3i'r^'<J<tOC^COCOOlW3'«»<iCl'— 'iCOOO'^C^C^-^OSCOmO'— 'O^OtOOiOSt^ 



Oio-^ic^"5cocO'— iTtH'xj'Tt^r-cor-t^"— '131'^Oi'— -ocoio oioo(mooc^ 



CMi-HCO — KNt-.'^O'— t CO CO"— 'CM»?^ 1— ICC CO ^—CM 



»— iMCO^iOOt»OOCiO'— tC^C0^W5CDt>-00'3iO'— ''^^CO^lCCD^*OOOiO 



000 ■<*< •-'00 



»0 ^H 01 •— I 1— ' 



<— I ^ CM 



CO t-H t-H 



CO 00 CM CO CO 

 CM lO CO 

 1-1 CM 



pa 



Oi CM lO "-I •«*< 



^H ^CO T^ CO 



CM »-' CO 



