222 
MESSRS. T. E. STANTON AND J. R. PANNELL ON SIMILARITY OF 
Table III.-—Experiments with Air (continued). 
Mean velocity, 
centimetres per second. 
(ft) 
Surface friction, dynes 
per square centimetre. 
(R.) 
Value of 5r 10 2 . 
pv z 
Value of ~ 10-s ■ 
V 
Pipe No. 1. 
Diameter 2'855 cm. 
Temperature 15° C. 
(continued). 
311 
0-544 
0-457 
6-00 
607 
1-703 
0-378 
11-70 
675 
2-09 
0-374 
13-00 
755 
2-53 
0-362 
14-56 
9S5 
4-02 
0-348 
19-00 
1140 
5-20 
0-325 
22-00 
1645 
10-00 
0-302 
31-70 
1512 
8-48 
0-303 
29-2 
1458 
8-02 
0-307 
28-1 
1410 
7-56 
0-310 
27 • 2 
1347 
6-98 
0-313 
26-0 
1235 
5-98 
0-320 
23-8 
1195 
5-65 
0-323 
23-0 
1102 
4-87 
0-327 
21 -2 
Steel Pipe, 10‘1 cm. Diameter. 
279 
318 
0-333 
19-1 
Pipe No. 16. Diameter P255 cm. Temperature 15° 0. 
.... 
655 
2-492 
0-476 
5-56 
383 
0-961 
0-534 
3-25 
350 
O-830 
0 • 553 
• 2-97 
421 
1-155 
0-532 
3-57 
482 
1-446 
0-509 
4-09 
803 
3-570 
0-452 
6-81 
883 
4-203 
0-440 
7-49 
454 
1-283 
0-509 
3-85 
570 
1-952 
0-490 
4-84 
732 
3-010 
0-458 
6-21 
537 
1-737 
0-491 
4-55 
404 
1-062 
0-531 
3-43 
606 
2-218 
0-493 
5-14 
323 
0-664 
0-519 
2-74 
440 
1-206 
0-509 
3-73 
765 
3-290 
0-459 
6-49 
978 
5-080 
0-434 
8-30 
1152 
6 • 675 
0-411 
9-78 
1317 
8-410 
0-397 
11-18 
1465 
10-020 
0-381 
12-43 
1051 
5-735 
0-423 
8-91 
984 
5-060 
0-428 
8-35 
1530 
10-930 
0-382 
12-98 
