;30 
PROFESSOE K. PEARROX OX THE IXFLUEXCE OF XATHRAL 
Let subscripts I, 2 , 3, 4 mark the organs A, B, C, D respectively; let h^, ho, 
s^. So, pyo be the constants whicli determine the selection of A and B; and let us 
apply (xlv.) to (xlvii.). Here the coefficients will be obtained from the set for q = 2 
in (xxxiii.) and (xliv.). Hence we find : 
3 
^3 
= (To 
1 — '>'n — O.s" ~ ’’9/ + 2r,3r 
23 
' 12 ' 13 ' 23 
1 - 
O 3 A 3 O 2 
1 - ^ 12 ' 
( 
+ 
•^1Y 1 f '^'23 03 A 2 Y / ^2 Y 
+ [T^I [<rj 
) ^’l3 '^’ 23^2 ^ 23 '^13^2 ^1% 1 /'K-Ri' ^ 
2 _ 2 [ ^ 02 “ OF ~ '^’ 24 ” + I I t ' 24 ' 12 \ / '"1 
^ O ' 
= 0-4 
1 - r,. 
+ 
12 
q* \ ^ / Q \ ^ 
'11 ' 01' 10 \ / ot 
1 - nF 
I o _ ’*’14 ~ '^’24''’l2 ’’24 ~ ’’l4’’l2 1 
^'S4 (^- '^42~) '^'l304 ^’23^^"24 ~t O 2 24 L ^^'l p’ 23 ) 
1 - 
12 
+ 
r — V T \2 / s \2 
'24 14 ' 12 ^ / ^2 
1 — 'l\o~ j \ CTo 
. (hx.). 
+ 
'13 
^’23^’l2 '^’U “ '^’24"'’l2 / h 
]. - f 
12 
1 ’’ 12 " \ 
+ 
^23 03^12 A4 ^1402 
1 - rj 1 - 
+ di 2 
/O 3 “ '^’ 230 ; 
! ^’24 
"■ ’’l 4 ^’l 2 1 
’’14 - ’’ 24 ’’l 2 ’’ 
23 03 ^'l 2 \ 
hh 1 
( 
\ 1 - 02 = 
1 
2 + 
'12 
1 - 
1 - 02 = J 
^1^2 J * 
• \ 
93 
'^2"d 24 
= «lO-3 
,910-4 
= 8o(To 
= *’ 2^4 
'^’13 ^’l2’’23 '^1 
' 23 
1 _ 2 
'12 
O’! 
1 
'’14 ” ''’l2'’24 
0 
1 '24 
1 - riF 
<^1 
+ 1 
Os '’ 12 O 3 
'^2 
1 ’’l3 
1 - '-12= 
O-o 
+ 1 
O 4 ~ ''’l2^’l4 
So 
1 ^’l4 
1 - ' 12 = 
(To 
+ 1 
?’ior13 So 
AT 
' 12'23 
-}■ 
0-1 J 
• • 
• (Ixi.). 
(Ixii.). 
(Ixiii.). 
(Ixiv.). 
Finally, for the change of means of the non-directly selected organs, we have : 
X o = 
^13 ^12^23 ^7 I ^23 ^12^13 ^ 
1 o '^1 T* 1 o 
1 (X^ 1 O'; 
X. 
_ O 4 "'’l 2'^’24 °’4 7 , I ’’24 O 2 O 4 7 , 
— 1 o ”1 I 1 o 'R 
-L '/ 0*1 X O',-) 
(Ixv.). 
(Ixvi.). 
If we write (Ixv.) and (Ixvi.) in the form— 
