MOTION IN RELATION TO THE SURFACE FRICTION OF FLUIDS. 
9 •) Q 
Lt tj 
Table III.—Experiments with Air (continued). 
Mean velocity, 
centimetres per second. 
(»•) 
Surface friction, dynes 
per square centimetre. 
(R.) 
Value of 10 2 . 
pv z 
Value of - 10-3. 
V 
Pipe No. 17. Diameter 0'7125 cm. Temperature 15 '5 C. 
460 
0-971 
0-374 
2-215 
313 
0-617 
0-514 
1-51 
451 
0-931 
0-373 
2-17 
579 
2-175 
0-530 
2-78 
784 
3-800 
0-505 
3-377 
662 
2-850 
0-530 
3-185 
579 
2-125 
0-519 
2-780 
576 
2-075 
0-510 
2-770 
564 
1-920 
0-493 
2-715 
557 
1-840 
0-484 
2-768 
552 
1-790 
0-481 
2-655 
541 
1-600 
0-447 
2-600 
504 
1 -255 
0-403 
2-425 
417 
0-870 
0-408 
2-010 
507 
1-365 
0-433 
2-440 
536 
1-690 
0-478 
2-580 
557 
1-850 
0-489 
2-680 
550 
1-860 
0-503 
2 • 645 
441 
0-940 
0-395 
2-120 
497 
1-175 
0-388 
2-390 
528 
1-527 
0-449 
2-540 
387 
0-799 
0-436 
1-860 
374 
0-779 
0 • 455 
1 • 800 
356 
0-754 
0-484 
1-712 
305 
0-632 
0-554 
1-468 
347 
0-706 
0-479 
1 ■ 670 
212 
0 • 423 
0-768 
1-012 
285 
0-576 
0-582 
1-370 
300 
0-602 
0-548 
1-440 
268 
0-548 
0-627 
1-288 
273 ' 
0-543 
0-598 
1-310 
358 
0-727 
0-464 
1 -722 
336 
0-679 
0-490 
1-620 
327 
0-648 
0-496 
1-570 
300 
0-610 
0-552 
1 • 445 
1047 
6-440 
0-480 
5-030 
1152 
7 • 750 
0-467 
5-535 
1224 
8-360 
0-456 
5-890 
1245 
8-560 
0-451 
5-995 
1384 
10-300 
0-439 
6-655 
857 
4-460 
0-497 
4-130 
Pipe No. 18. Diameter 0‘361 cm. Temperature 16°'5 C. 
849 
3-46 
0-391 
2-06 
594 
2-45 
0-566 
1-44 
344 
1-41 
0-970 
0-838 
274 
111 
1-210 
0-667 
191 
0-786 
1-756 
0-465 
