VISCOSITY OF WATER BY THE EFFLUX METHOD. 139 
Relative oi of Distilled Water, 50° to gt C. 
Temp. Gd Ge 
50° C. a 334 328 nie 
55 358 360 349 354 
60 388 387 380 372 
65 420 415 418 398 
70 453 448 444 421 
75 487 443 
80 522 462 
90 - 596 546 
The results indicate that the form of the curve best representing 
the relative fluidity, is not well determined for temperatures above 
50°, and that further experiments are required. Probably it will 
be found that a in formula (37) 0 must be slightly increased and B 
diminished. 
25. Relative fluidity y of distilled water near the temperature of 
maximum density—The curve of relative fluidity gives some 
indication of an inflexion at about the temperature of maximum 
density 4° ©. as will be seen from the following results for 
temperatures 0° to 10° C. 
temp. Pa Pe Pe Gd ss Ge Ss Mean. 
0 1000 1000 1000 1000 1000 1000 1000 
me os. 4014 1014: =. cise _ 1014 
pe 108e gs sy ce ms 1022 
l ce au i TORR Tega 26 1050 
1091 1076 .. 1084 
: 1198°01168>. oe 
4 Re es SS LA ae 1157 
: £992-21179. 1189~ 1187°:1180: 1176 HA 
1258 1265... 1261 
'. 10 1356 1365 1367 1364 1373 1366 1365 
Ga 
Notr.—Pa, Pe and Pe, are results from Poiseuille’s tubes A, C and E; ; 
and Ge from Graham’s tubes D and E; and S from Sprung’s. 
oe the values obtained by assuming that the fluidities 
m 0° 
to 10°C. are given by the expression 1000+ 36-57, from 
