ON THE DIFFUSION OF LIQUIDS. 21 



Wiedeburg and Wiener, and be put equal to a+ßu, theo the differential 

 equatiou (3) gives at once, 



lu, d 2 M S 2>"(ir) 



As u-x curves for various values of t are known, we can deter- 

 mine — — and — - graphically for given values of a; and t, and by 



*Y_Y *2\ 



plotting ir against x, we can also determine -4%^ and thus calculate 

 a and ß. But as this method is lacking in accuracy, I did not under- 

 take the task. 



March 7, 1903. 

 Physical Institute, Imp. Univ. of Tokyo. 



^S-^ûr^ï-a- 



