( 396 ). 
1 do dS 
Tie fe —w)dy(r)= 
r=—wu 
1 @&o 1 de 
= |— EE (72—u?) zo) = a “Ef vore : 
ru T= 
This integrated term is zero for the two limits. 
So we find for the component of the attraction L PQ: 
1 2 : 
PO Fi Ef vor ’ 
and therefore for the attraction of the cylinder: 
io 2 
ao fom low +z 2 Pe (voral 
0 u 
and for the molecular pressure in the direction of the capillary layer: 
a 1 d% 
fe du c w (ux) + oe ae 
0 ze 
w(r)r ar| : 
This expression becomes : 
ATEN 
0 u 
d 1 Sep ‘ 6 
| wu) du — — og — { du | rd wir) . 
0 z 
The latter term may be transformed into: 
1 d% 2 alae fe eco 
— — du |M TT (U au TV ie) Mee 
2 . = ; k | 2 df dh?, ” 
0 u 
0 u 
1 d°g An : zn do Ee ( ) 5 
mi En Uu Tt (Uw) a? t u a 
PTD ry ee zeef 
0 
1 df 1 d% i ere ie 
= 7 @ DE. um (u) du + eS 5 9 unl | + ros ef” 7 (u) du . 
0 0 0 
