Viscosity of Water. 509 



obtained from the curves, and the corresponding values of m 

 were deduced by equation (4). 





Tube I. Tube II. 



Tube III. 



Tube IV. 





EtoL. 



L to E. E to L. 



LtoE. 



EtoL. 



L to E, E to L. 



LtoE. 



c 



10-4XC 



m 



6350 

 9-60 

 1-130 



6330 7400 

 9-81 10-00 

 1-164 1164 



7440 

 990 

 1-162 



4570 



7-78 

 1-128 



4570 ! 5400 

 7-78 724 

 1-136 1-166 



5390 

 7-60 

 1-216 



The values for m are all greater than the theoretical value. 

 There are also two values for each capillary according as the 

 liquid flows in at one end or the other. This fact is most 

 marked in the case of Capillary IV. 



The above values for C were used in calculating K in 

 equation (5) for the four tubes. R/L was also calculated. 

 These values are collected in the following table : — 





Tube I. 



Tube II. 



Tube III. 



Tube IV. 



K (mean) 



E/L 



•005504 

 •003407 



•005463 

 •002908 



•005480 

 •003774 



•005478 

 •003172 





It is evident that there is no linear relation between K 

 and R/L. When the above values are plotted in the way 

 already mentioned, it will be noticed that they lie along a 





1735. 









Fig 6. 





















o 





o 











y< 



J 



















o 





17 85 



30 



i\ 



32 



53 



3<V 



35 





3T 



38 













--?vy L » 10* 















895 











o 











22 



885 



30 



51 



o 



35 



6* 



35 



36 



3? 



o 



■*a 













-■R L . 10* 















550 







f-\ 















C} 



i 



b 



540 



30 



11 



u 



1 



33 



64 



35 



36 



31 

 i 



1 



•"&/, *• 'O* 



straight line parallel to the axis of abscissae ; that, therefore, 

 K in equation (5) has zero value, i. e., the value for n is zero. 

 See fig. 6, 



