16 
BULLETIN 670, U. S. DEPARTMENT OF AGRICULTURE. 
cocococNr~a5coi9<to<Nij<ioio- 
ic iN^r x-:c^?:c)K^:c:ci- re 'O re re . 
■*15 0>«U5000 U5>OfflHt<D<*Mn'OMOit-CNOO!CC'? 
I- to 
S3 i 
t^t>.ooo nnonmcoo o onncoco oconcissonk 
■*'*6ioa McofiL'JL'iwLOffl to _ o to to' oi ^h lo _^_^o cn c4 to t>.' c4 ue> <ri c4 -r 
^3 +5 H 
CoS« 
lO^OCHiOOCNtOtHM 00O0CO NMOIHMOOCO 
cq^Oi-JoioirHt^oco ^_ •>* shoo oo "i to e<t t' «6 eo «5 
Miwooeoi-iioioeoo 
- — 
(MlOt^tOCNi-HTPCNtOO NLOrfO CHO00COC0<MCO00 
MCOCOMI'M'OiodM ^-^ cncc>o -^t^»oeocNtoc^_ 
-<*< io -^< ire to co co *-e o 
Nt-coOK-rcj-x WLir^H 
1 t~- o cn cc co r~ to - 
e4eNrHcNi-5e4c4i-H 
i-i to MNNSoSir'r. 
CNCNCNCN -tr I> rH C^ c4 o4 OJ ' ' 
-.-i ^ CN i-H CO r-i cq 
& .2 • 
.SPSS 3 
ICCXOOOJOOrtNN _r~- ■* t^ co to to i-i 0C JO t^ to 0C i-O CN1 t^. o to jr. JN l~ -j\ 
— ? 
co i-4 
^rr^*rco c^'-o £ 
H C/H CM www 
o [_ • 
ft -j : 
5 p 
d^°d"S o J 
:S1* SI'S ="3 
! C 
•= = 
30 ;."S ! « '. 
oi;o Soi3o 
: 3 o 
S 3 O 
p£S<axa 
"5 
£= S 
a 1 
•ggs " 
:J3 
C3 
O > O 
n t; to _ o o o 
rtccca?*^ 
o o 
as 
0000 
'O'O'O'O 
3'C'dg'Cid^^'Cd hfe 
flO O ... 
A o SC c > 
O > w o " 
Ster -fe? 
t- o 
22 «, 
©£ 
i~ -o t^LemittoNw! 
n.0 — ro 
CN M X 
ieo t»- ts-oo nm>oi 
OS CO ~ CC SO f- t^ 
ornNNOiCLCr-^rccrCOinz cr. _ ■- cr. .' — :: re re r: r: — ij- r 1 ^J — — ^_. 
K O C C rr r. ? 1-: 'C r: .r n n - /. — M y y; y - ■ - ■_-: '^ '_;. '_e o. _. ■_. r^. re rr re o. _. 
