G. H. KNIBBS. 
Tube. — Expts. : x105 R*X109 Length 
#,* 1=3 174 = -04840 0°85 
Gye 1=3 175 3°3394 2°44 
D,* 1~% 219 22440 0-995 
B,* 1~3 240 10-331 2-3575 
A, 277 25-231 2-555 
F, . 326 11233: 9:9725 
Gar L=3 421 3°3394 1-015 
A, 450 25°231 1°575 
Mean 
M,* 558 002367 0-125 
B, 630 10-357 0-9000 
F, 646 11290- 5-045 
D,* 13 649 22331 0-335 
E,* 1-3 706 = 048.40 0-210 
C, 709 =. 33394 06025 
A, 742 = 95-231 0-955 
A, 1046 =. 25-231 0-6775 
Mean 
F, 1254-11316 2-600 
Bb, 1455 10:368 0°39 
Ff, 3034 11316 1-075 
A, 7088 25-231 0-1! oo 
General mean, rejecting last four 013107 : 
Nore.—For an explanation of these experiments see § 19. : 
10. Flow in @ right circular cylinder.1—The formula for 
for 
ro fe 
ma right circular cylinder may be readily deduced directly zn 4 
Navier's equations for a viscous incompressible fluid by ni 
~~ * the axes, X say, coincident with that of the pipe * 4 
assuming that the motion of all particles is parallel theret® a 
sare EE “a 
Pee Ms be assumed in this and the subsequent sections as far 4 ee | 
nat slipping does not occur: so that the deduced formula must be mes 
iti of zero velocity at the boun ptains in ev 
bai dary probably o ec 
of steady rectilinear flow through tubes or pipes. : 
