BULLETIN 452, U, S. DEPARTMENT OF AGRICULTURE. 





^ 





<3 





fc 





<< 





ft 





O 



T3 



o 



3 



* 



A 



■x 



•|H 



w 



PI 



a 



o 



r/) 



<.; 







- 



k 



£ 





■«l 



ei 





ts 



N 



g 



S 



o 



*>s> 





s 



c 





5 



^ 



o 



s 



^ 



a 



> 



„ 



M 



s~ 



OS 



s 



t> 



? 



C 







S 



QU 



fc 



H 



<5i 



«S 



M 







S 



C3 



fc 





M 



eo 



S 



a. 







w 



.«=> c 



o 



*n 



03 

 t-. 

 03 



03 

 2 



'3 

 < 



SI 









•o 



CO 



© 







1 







= 



z 







• 





00 



— 









00 



OS 



cr 





il 



o3 3 



sa 









CO • 



o 



00 



o ■ 



l 







AC 









CO 



o 







CM 

 CN 

 CN 



CM 



: 1 



- a5 

 > to 



<1 03 



00 CO 

 COO 



CO 00 



o 



CO CO 

 CO o 



t~ o 



>co 



COO 



1 



GO 



o 

 m 



CM r^co CN 



-T CO ^CH -H 

 COOCO CN 



ri tA i-H N 



CN 



m 



o 



o 



CO 



a> 



o 



00 



CnI 



■n 



00 



" 1 



> 



c 



03 

 Uj 



03 

 to 



3 

 eb 



si 









CO 



CO ■ 









CO 



CO 









CN 



CN 







CN 



O 

 CN 





03 3 



sa 









I ! 









c 



CO 



o 



CM 









CN 

 CN 







CO 

 CM 



1^ 



CO 

 OS 





I- • 



t> to 



CNr^ 



t~co 



O CO 

 CN CO 



t> o 



i-l CM 



Oco 

 coco 



CN 



CO 



[ -' 



^c" 



OC51-IIN 



CN ~ COO 

 CNCNCN CN 



00 

 00 



c5 



00 



00 



o 



2 

 "3 



o 

 o 



u* 

 03 



00 



•sa 









CO 

 K 



cm 











e 









1< 







CO 



o 



CO 



: 



o3 3 



sa 









00 











o 



CO 









CC 







o 

 m 



05 



: 





00 CO 

 T CO 



cncn 



CM 

 CN 



■* CO* i-H 



.oil 



CO | CO 



C5tt ICC 



coco^'cc 





CO 

 CO 



CO 



o 



OS 



CO 



CO 

 CM 



CO 



2 

 "o 



"o3 

 O 



sa 









CO 



o 



~ 1 





II 







CO 









cQ 







-r 



CM 



00 

 CM 



CM 

 CN 





•sa 



03 3 



sa 









e 

 "' 

 e 



CN 











CO 



II 







CM 



CN 







CO 

 CM 



00 



CO 



CO 

 CN 





t> to 



oco 



CNO 



oci 



CM .M 



CO 



iO WCM 



** 1 M«C 

 CM CM ^H 



1! 



t^- 1 or 

 o | an 



a. | cc 





io o r^ ^" 



CN C-4 CS CM 



m 



CM 



CM* 

 CN 



CO 

 CO 



-5- 



Aver- 

 age 

 specific 



gravity. 



GO CO 

 t— CO 



oo 



CO 



o 



M 1 .-< cn 



Ol oo 



OS I i-l 



co m 

 r^. co 



o I o 



"* Il ^ 



00 GO <N 00 



C:t*OtM 



OOriO 



X 



e 



in 

 t-- 



oo 

 o 



CO 



in 

 »n 



o 



'fc- 



oot-^ 



30 





II 



in 



lO 



■n 



co cm t^" ri 

 CM CM o^ a 



CO 



t-- 

 o 



CN 



co 



CO 



Num- 

 ber of 

 sam- 

 ples. 





CM 



" 



1 



OI 





-HCNT-lf-l 



>n 



CO 







c3 

 o 

 _o 



■d 



03 

 ,® 



3 



6 

 g 



H 

 S 



5 

 p 



o 



CO ^ 



£ r 

 c 



< 

 "a 



y 



■ 



j§ 

 - 









« 







1 



« 

 b 

 cc 



s. 











« : 

 o 



j ! 

 o 



03 



PQ 



2 



63 

 H 



51 _c 



c 

 c 



p 

 a 



"a 



c 

 ■>p 

 > a 



c 



! 



C 



' 



c 



•c 

 c 

 or 



| 



a 

 a 



: 



P3 



6 

 p 



( 



V 





55 



C 



P3 



t 



c 



1 



a 







y 



G 



a 



' 



1. 



s 

 p 



c 



c 

 "A 





cm' 



d 



>5 



►J 



w 



M 



W ■ 



CO 



cv 

 a 



CO 



