36 



R. HOSKING. 



Temp. ° C. 



69-91 

 70-10 



71-58 



71-58 



80-27 



79-90 



81-19 



81-19 



90-00 



90-10 



90-10 



90-10 



95-8 



97-7 



97-7 



K.E. term 



Viscosity 



Reduction 



x 10 6 



x 10* 



10 x 5 



19-7 



410 



-05 



20-8 



405 



+ 0-5 



25-3 



396 



+ 9 



25-3 



396 



+ 9 



22-5 



357 



4-1 



20-8 



356 



±0 



26-6 



350 



+ 5 



26-6 



350 



+ 5 



22-5 



316 



±0 



29-0 



314 



+ 1 



29-4 



316 



+ 1 



29-3 



316 



+ 1 



23-9 



298 



+ 3 



23-6 



291 



+ 8 



23-6 



291 



- 7 



Viscosity at even Temperatures. 



•004095 

 •004055 

 •00405 

 •00405 

 •00358 \ 

 •00356 f 

 •00355 I 

 •00355 J 

 •00316 



l\ 



•0031 

 •00317 C 

 •00316 I 

 •00301 

 •00299 

 •00284 at 



00406at70°C. 

 •00356 at 80° C. 



•00016 at 90° C. 



•00300 at 95° O. 

 100° C. 



These values agree so well with the four absolute values 

 already mentioned, at the temperatures 0° 0., 10° C, 25° O. 

 and 50° O. respectively, that I feel justified in concluding 

 that at the other temperatures also they may be taken as 

 absolute values. When these results are compared with 

 those of Poiseuille, Graham, Rosencranz, Slotte, Noack, 

 and Thorpe and Rodger, as re-determined by Knibbs, it 

 will be seen that their closeness to the mean values at the 

 different temperatures as far as 50° C. is remarkable. The 

 following table will give the values for the relative fluidities 

 between 0° and 100° C, at 5° intervals; the fluidity at 0° C. 

 being represented by 1000. My values at the odd 5° were 

 interpolated by means of a graph. All the values of the 

 other experimenters are those given by Knibbs in his 

 paper. 1 



This Journal, Vol. xxx. 



