18 



BULLETIN 740, U. S. DEPARTMENT OP AGRICULTURE. 



'•A £ £ 



£ fc fc 



lO OO <N OO 

 Ol « o> t- 



^.'OOOOOOOOOOOOOOOOOOOOOO OOOOOOOOQOOOOOOQ 



0^0>NN«CCiOidcC(dtodcOCDMpf'*iOlOlOtOC Ooi'^'^oSosCCC^'^-^^'^COiOCDcO 

 ~ r~ t> 00 00000000&COD0C0Ct-~i--ICCCCO00C0000a000 r~c~aooor*-t'-ooooooooooooooooaooo 



~JOOOOOO'OOOOOOCOOOOOOOOO oooooooooooooooo 



nMrHHHrHrtHHrtlHHONrtHHrtHHHH 



WC<ll-H^HC<lC^t-lr-li-Hrt>-Hi-li-lr-IWi-l 



4 g 

 as be 



gw 



I? 



i-H >-l r-< O 



© .-( ri iH 



O tH .-I i-H rH 





G5 



K.2 3 

 or? 



00 



■* 



« 



CR 



O 



tO 







(. 







^ 



s 



f^ 













^ 





CO 



oo 



o 



00 



lO 





»c 





OS 









r~ 



CO 



































CI 



<N 



o» 













o i-H -*r 



cn cq in so 



00 oo 



.9 .9 .9 



i-H CN CO 



<!^<j<;<5<1-<<i^-<<) 



9 9 9 



<-<«;.<<<<<<<<< 



go 



.is a 



_ 





.9 

 a 



•3 



15 



a c« 

 a** 



m 



! 



