THE VISCOSITY OF WATER. 



Table of Relative Fluidities 0° C. to 100° C. 



37 



Tenip.iPoiseuille 



Graham 



Rosen- 



Slotte 



Noack 



Thorpe 

 and 



Average 



Hosking's 



»c; 



1846. 



1861. 



CY2LHZ 



1877. 



1883. 



1886. 



Rodger 

 1894. 



Values. 



Values. 



o 



1000 



1000 



1000 



1000 



1000 



1000 



1000 



1000 



5 



1177 



1183 





1181 



1178 



1176 



1179 



1178 



10 



1363 



1369 







1372 



1375 



1365 



1369 



1369 



15 



1557 



1580 







1574 



1575 



1562 



1570 



1569 



20 



1771 



1786 







1785 



1796 



1772 



1784 



1782 



25 



1992 



2021 







2005 



2020 



1992 



2006 



2008 



30 



2226 



2240 







2233 



2233 



2225 



2231 



2241 



35 



2479 



2493 







2473 



2484 



2466 



2479 



2477 



40 



2738 



2758 



2730 



2717 



2726 



2716 



2731 



2730 



45 



3010 



3018 



3020 



2961 



2974 



2976 



2993 



2988 



50 







3308 



3270 



3214 



3214 



3246 



3260 



3260 



55 







3549 



3540 



3477 



3479 



3517 



3512 



3530 



60 







3834 



3720 



3744 



3763 



3797 



3772 



3823 



65 







4165 



3980 



4017 





4086 



4062 



4112 



70 







4461 



4210 



4294 







4385 



4338 



4414 



75 









4430 



4571 







4693 



4565 



4719 



. 80 









4620 



4849 







5003 



4824 



5037 



85 











5128 



.. 





5316 



5222 



5352 



90 









5460 



5409 







5633 



5501 



5674 



95 











5695 







5955 



5825 



5977 



100 











5083 







6282 



6132 



6314 



It was found that my viscosity results could be very 

 accurately represented by formulae of the type % — y Q /l + 

 kit -f fc 2 t 2 , provided the range of temperature for each set 

 of constants was not very great. Thus for temperatures 

 0° to 25°, the formula is 



= '017928 m 



' h 1 + '03445 1 + -000235 1 2 V ' 



for temperatures 25° - 50°, 



-017928- () 



1 + -03544 1 + '0001952 t 2 v ; 



for temperatures 50° - 75° 



= -017928 ,oa 



h 1 + -0364 1 + -000175 t 2 ( ; 



and for temperatures 75° - 100° 



•017928 (4) 



' h 1 + -0390 t + -000142 t 2 { } 



