248 WIEDEMANN ON THE MOTION OF LIQUIDS 



II. Solution of Sulphate of Copper (9*3 parts CuS + 5 aq to 



The numbers furnished by these tables, as well as those ob- 

 tained by other experiments, give for each series of observations 



almost a constant value for - ; we may therefore conclude that 



the heights to which liquids are caused to ascend by the galvanic 

 current are directly proportional to the intensities of the current. 

 This result agrees perfectly with the law before expressed, 

 according to which the quantities of liquid transported by the 

 galvanic current into the clay cylinder in equal times are di- 

 rectly proportional to the intensities of the current. The beau- 

 tiful experiments of Hagen* and Poiseuillef prove, that the 

 quantities of liquid issuing in equal times from very narrow 

 capillary tubes are directly proportional to the charges under 



* Pogg. //wn. Bd. xlvi. s. 483. ; see also Repertorium der Physilc, Bd. vii. 

 8. 138. 



f Jnn. de Chemie et de Physique, S. 3. vol. vii. p. 50. 



