MOTION IN RELATION TO THE SURFACE FRICTION OF FLUIDS. 
217 
Table II.-—Experiments with Water. 
Mean velocity, 
centimetres per 
second. 
(*) 
Surface friction, 
dynes per square 
centimetre. 
(R.) 
Value of —10 2 . 
P'o 1 
Value of — 10-3. 
V 
Temperature. 
°-C. 
Pipe No. 1 
Diameter 2'8 5 5 cm. 
116-3 
41-8 
0 ■ 309 
25 • 32 
125-6 
47-8 
0 • 303 
27-36 
138-2 
56-2 
0-294 
30-10 
^ 10-2 
149-7 
64" 6 
0-295 
32-62 
• 
136-8 
55-2 
0-294 
30-00 
155-8 
68-5 
0-282 
34-20 
180-0 
88-0 
0-272 
39-5 
10 5 
201-0 
109-2 
0-270 
44-1 
214-2 
120-2 
0-261 
47-4 
\ 10-7 
95-0 
29-46 
0-327 
21-0 
104-1 
34-20 
0-316 
23-0 
95-0 
29-52 
0-328 
21-0 
84-8 
24-4 
0-339 
18-8 
73-6 
18-95 
0 • 350 
16-5 
r hi 
63-0 
14-44 
0-363 
14-1 
53-7 
10-93 
0-380 
12-0 
46-0 
8-26 
0 • 390 
10-3 
42-7 
7-22 
0-396 
9-60 
38-2 
5-95 
0-408 
8-58 
33-1 
4-74 
0-433 
7-44 
> 11 o 
27-0 
3-27 
0-449 
6-12 
22-3 
23-9 
0-481 
5-06 
29-6 
3-86 
0-440 
6-70 
11-5 
Pipe No. 1G. Diameter 1'255 cm. 
258 
199 
0-299 
29-18 
299 
259- 
0-288 
33-80 
343 
327 
0-278 
38-8 
i ft • n 
344 
331 
0-280 
38-9 
f- 10 u 
343 
328 
0-278 
38-8 
258 
198 
0-298 
29-2 
501 
640 
0-255 
56-6 
461 
556 
0-262 
52-2 
423 
479 
0-268 
47-8 
386 
404 
0-271 
43-7 
299 
238 
0-288 
33-8 
447 
526 
0-263 
50-6 
490 
612 
0-255 
55 • 4 
1 ft • Q 
528 
689 
0-247 
59-7 
552 
762 
0-250 
62-4 
584 
842 
0-247 
66-0 
612 
918 
0-245 
69-2 
632 
965 
0-242 
71-4 
673 
1078 
0-238 
76-2 
699 
1162 
0-238 
79-0 
, 
2 F 
VOL. CCXIV.-A. 
