52 R. HOSKING. 
Results at 50° C. with Tube IV. in Glischrometer. 
Pressure | Time of | Second Tacs Viscosity 
(h Flow (7)| Term di (mean) 
eee (Approx.)} x 10° A OC LOe 9 x LOE 
T3 | 615 | 123 || 552 | 549 
11 463 | 162 J a BAT 
( 544 
15) i. | Bae 201 | 2 ae 545 
| i( 547 
i det 
20 28+] 268 |. 4 546 
| el 
24 25:3 297 yy ade 
25 244 308 ee 546 
26 23-8 316 ie 551 
27 23:9 325 || ih 549 
28 22:7 332 |. 556* 
29 22:6 333 é 588* 
30 22:3 339 Ni 593* 
3] 21-9 R43 dln ds 598* 
39 21-9 yas 634% 
34 21-5 350 668* 
36 21:2 re eee 709* 
38 21-0 359. |... | eum 
| 9]: 5 | 822 | 2 * 
ap: AY 2a 359 |i ee tl pee 
| | 
| 
44 202 | 373 |{ me 837% 
Mean ‘00548 
With Tube I. in the glischrometer, the formula gives con- 
stant values up to a pressure of 35°4 cms. of mercury, when 
the time of flow is about 22 seconds. It will be noticed 
that at this point the kinetic energy correction is more 
than 60 per cent. of the viscosity, and the average velocity 
in the tube is 400 cms. per sec. 
