Theory of Statistics.) (Z' face page 186. 
TaBLE IX. THEORY oF CORRELATION : Illustration iii.—Correlation between (1) length of mother-frond, (2) length of 
daughlter-frond, in Lemna minor. -[Unpublished data ; G. U. Yule.] (The frequencies are the figures printed in ordinary 
type. The numbers in heavy type are the deviation-products (&m)). 
(1) Length of mother-frond (mm. of camera drawing enlarged 24 : 1). 
cle lglglele| ge F.C Y|E|E|E|E E|ElErg 
60-66 [pl a k E CASE = | — 
66 i 3 
I res’ 
ne = 95 
wt | 2° 
aT 2] IEE 275 
: s | COE = 
- a - 1 oe — 
ar y 65 | 45 | 4 ; 38'5 
6 4 2 2 = 
L | 4'5 7 245 
3 2 ne 
1c Sg | us | 5 | 35 | Co 89 
= 9) 0 0 a 0 hi 
Le = = a Us A . 26 
10¢ wo FWP EIR 5 2 
1 : ~ les | 65 A= 22 
1 + = 31%] Foi Poicdez 
> 1% J PR 23 > | l= fae 
Soom oe 
126-4 o | A atic = 
0 lls ot] an 2 NTT Ea 
182128 = Fe » nr 0 - ES 5 
moo le BE Ey HE a] 
138-14. =f = gE oul 15 " — | an oe 
—— se mem i ments 
i 
144-150 = | = | = 8 
160-150 A ribald 
jo - oo x = 
oto { — = = | = (fie=: SRau ~~ I~ iii 1 RI 
! Co T= 
162-168 { ge 
otal 8 105) 346 | 865 wo. 2564 4150 22. ot . 5 2 : 266 
Lo