174 



Prof. Sydney Young on the 



X 



03 

 *h 



S3 



IK 



m 

 <D 



u 



Pn 



.5 



o 



© 

 S-i 

 J-l 



o 

 o 



o 



OS 

 •"3 



c5 



P 



O 



<D 



H 



o^NHi>iQCioco5Hcooa)o>oot)oococ5(N>oai 



CM CN CM CM CO *0 



lOt-OrHOfM^NNfMNvOCOIMTHNONTHO 



(N^CCCQCOCOlH^OrHt-OiXKMrHOOoO 



OOOOO^rHr^CTMCMMCO^OCSrHlMlOt- 



•*OOiCOCMC5LTCCC5Mb.WOiOWNeO?O^OrH^ 

 O —h >— iCO-WiOt^OCMiOt^OCOt^T^cOTtH^iOiOCOiS 



OOCOOOOHHHHfMCKMCOrHffiOOONiO? 1 



cm cm cq^i. 



CM CM CM iS- 



C»fflT)i(MOOJWONMOOOOOWiQN(MQiOp 

 CM^iON01CqiOQOOW©OOCOONW03002 

 OOOOOHHH^MIMCQn^cOCOOHrf'* 



rH^r^T^^T^^^rHT^T^^r^T^T^-^CMCMCM^ 



OI^COCit^c^O(Ml>COOOt^CO»OOi 



Tr^ONOWCOXr-lMCO^Wr-l 

 OOOOrHHrHrt(MIN(MeO'*tO 



: co 



.NC5SMCO(MNMN«iiOC»OrHO'*'*©S > 



•■»fiiOt-CiCN'^H>-OiCOt^(Mi— it»05Q01>y 



:cppOp^'7H'7Hr^CNCMCp-*»pt-q5r : HCp < V > 

 lAll— IrHl— It— It— Ir^-i^Hr-lT^-l'T— It^-It— It— lA-lCMCM ^/ 



t-NfflH<M«OOJOCDO<0 00(MCO«0 . o 



COiQ'XO".HCOiOt»OCDHOOOOOCO • t-. 



ppOpH-nHHC^INM^ipcpOH :cp 



^Ht-Ht-Hi— Ii— Ii— It— I H i- Ii— Ii— Ii— It—It— I CM CM '• "*& 



CO vO C5 t- 5£> 



io eo t- o co 



O OO r-H H 



COt-^COCM00fMI>(M 



OOOHHHr-l(NCq 



: «o 



P3 



■+3 



o 



<1 





B«* 



t-C5 CM OSt^ CO' 



: co 

 : ^ 



NCCONCOCOCONNOCnHOOOHOOO 

 CJCNOCdOQHTjfO^COOHHOOO 



POpr^r^r^^CMCMCpCp^pCppCMTHTlH 

 r^T^rlnT^r^F^r^T^T^T^rHr^r^i^(MCMCM-^ 



»OCt-COO(NiOO>CCCOCMCO 

 i— it— ii— (CMCMCMCOCOCO 



