132 



Determination of the Viscosity of Water. [Dec. 13, 



In all other experiments on fluid friction with which I am acquainted 

 (those on capillary tubes excepted) the term depending on the square 

 of the velocity becomes the most important at speeds far below those 

 used in this series. 



Many experiments were made on the viscosity of fluids other than 

 water, but as T find that the results do not differ materially from 

 those of Poiseuille it is unnecessary to give them here. 



DIAGRAM 1. 



DlAGEAM 2. 



