50 



BULLETIN 623, U. S. DEPARTMENT OF AGRICULTURE. 



•SITIUJ 



^3 



m 



IS 



(^ Co 



2 e 



Is 



•jaqranjv]: 



•^qSraAV 



•jaqnmjs[ 



•it[SraA\. 



•J9qtnnjs[ 



•;q§i9Al 



•jraqmn£j 



•ni3T9AV 



•jgqranjsj 



•■jqSraAi 



•joqmrij^ 



•^qSraM 



ueqxnnjvi 



•WSraAi 



•aaqnmjs!: 



•*q3raAi 



•J8qnmjs[ 



•TOgpM 



•jaqxnnjNj 



•;qS]8Ai 



•jeqranN 



NrHONO 

 CM rt r-t 



© O © O r-l SI 



9hCh« 



I I _L I J 



OOOOM 



oo©o© 



IN'*©© 



cm r~ -^ © ^ti 



HOCCON 



COO 00©O 

 © © fHCO 



^ t~00CM CM 

 [III 



~H© © 00 ■* 

 CM CM CM -J" © 



CM CO CO CM •* 



I I I I 

 CM CO »0 © LO 



HHHCiM 



1^© -*f © "^ 



to •<$* © © CM 



I I I I 

 CM T-< CM © CO 

 •* lOCM^CM 



CM CC 00 CM 00 

 CO 00 tO© i-H 



CO -^ CO »C LO 



'O 0C N CO N 



i-H©CM-* 



©©f CO © 



tO © © © CM 

 CM CM 



CM CO -H 00 CM 



CO© t^ 00 CM 

 Oi-h4>©© 



CM © C t^ O 



O © COCO© 

 ©©©CM© 



T* © © CM © 



I^^H © -*< CM 



h(N i-t w ^ 33 



©^©©ti 



■^H lO ©-* t^ 



CO © CM © t^ 

 CM CM CO CM 00 



CM©'* 00 00 



^J<CM CM CMtJ. 

 OCM i-H CO CO 



■*©©00-H 



CM © © © © 



I I I I I 

 ~H CM CM COO 



^ © lOCM © 



lOMONO 



2cU©© 



or: *-. -H CO -+i 

 I - r ~ co ro CM <M 



^q§T3M 



OO'OCCCN 



,-, CM CM -H W H 



CO iO t}< 00 -3* 





O^NCOph 



©^22© 



M 7 -t /. ^ 



CM©CM0OCO 



© i-H i-H *HO 



CT-iiOOnt 

 ■* CM -q"^> -*i lO 



CM CM »0 ^ rJH © 



r-©oo © © r^ 



i-H i-H ^ H CM 



O -f CO -f CO © 



© CM i.O © CO — I 



O be 



b/jT^ ©' i-H 



tgO i- H CM CO ■* lO 



^ © © © © © © 



Tt< lO ^ gO- < CM CO •* lO ^j 



ko 



■ICMCO- 

 -^ © © © © © © 



O 



