BULLETIN 536, U. S. DEPARTMENT OF AGRICULTURE. 
It 
cq 
s3gg?K 
as 
= Z -=-*>§ 
~ - t; Cu 
<- a ° e -- 
£t3>,oo 
II! -1- 
g~a5§z; 
1 £ao-§ o"5. :,~3 . £ 3 2 ££ 
6l6S a Si 
£ S CO += Ofl. 
- .5 3 "3 S ft o b 
2 2 
|JS 7. g £ 
CO 
,g Q a» ** 
o ft = "B ? ^ 
§ g = c3 o 
2 § bo © S § 
CO 
t-z go « f> o 
5~.ft §SZ: 
g*a-e 
H > - 5 5 
= £* 
o 3' 
saliSJals 
fPsaa! 
C .=£ _, ftJ= ^ | 
ondit 
for 
and 
whi 
s mu 
sligh 
tovci 
°-g f »-S3-gg 
© 
SJ 
- £ 
o ft 
CO 
c 
~ 
Ci- 
T3 
1? 
= 
E 
s 
cS 
- 
. >» 
~ 
U S •_ = Q S 
- ~ - 3 a na 
bBO >c3© O 
C -.: : • 
§g§2o 
c j =3 H a 
is >-^o 
c 3 GO'S* 
S^S^™ 3? 
2 5 of-9 sf,a 
iifjifi 
GO 
. o 
x-3^i = " r if=--. r3g 
3 ™ S a '. = - — ' s ® "I -2 s — = -= 
.i:"3.r o oa 2^« JH s 5~ ~"5 ft ^ a 1 
fe cb 
