36 



Motion of Viscous Liquids in Channel*. 



Fig. 4. 











| Wr 

























\ 













/ 



/ 



I'M- 







\ 











/ 











\ 











/ 



/ 











\ 



\ 





/ 















\ 







/ 







b 









\ 





/ 



















\ 



/ 



















\ 



-2 -4- -6 -8 

 Surface-velocity curve for Parabolic Section. 



Fig. 5. 



It/^tH 



• •* -2 -3 -4- -5 -6 -7 -8 -9 I ^ 

 Surface-velocity curve for Triangular Section. 

 o£ the channel and their reflexion in the free surface, and 

 I is the moment of inertia about its centroid of this section, 

 then for the majority of simple cases k has a value which lies 

 between -0228 and *0260. In the two present instances we 

 have respectively 



* = -0252, /e=-0232. 



