IN A CLOSED GALVANIC CIRCUIT. 241 



III. Solution of Sulphate of Copper (19*1 parts Cu S + 5 aq to 



100 parts of solution). 



m 

 «. m. — • 



« 



106 2-48 grms. 2*34 



101 2-32 „ 2-30 



98 2-26 „ 2-31 



93 2-11 „ 2-26 



65 1-49 „ 2-29 



53-5 1-25 „ 2-33 



Mean . . . 2-30 



IV. Solution of Sulphate of Copper (7*27 parts Cu S + 5 aq to 



100 parts of solution). 



m 

 T 

 817 4-145 grms. 5*07 



687 3-510 „ 5-11 



660 3-245 „ 4-92 



636 3-175 „ 5-00 



442 2-190 „ 4-96 



Mean . . . 5-01 



These tables prove that, whilst the intensities of the currents 



fn 

 vary in the proportion 1 to 6, the quotients -r, or the ratios of 



the intensity of current to the quantity of liquid transported, 

 differ only about —jr from their mean value. Hence we may 

 safely assert that the quantities of liquid transferred by the gal- 

 vanic current into the clay cylinder in equal times, are directly 

 proportional to the intensities of the current. 



§5. 



A second question to be submitted to experiment is, what re- 

 lation exists between the quantities of liquid transferred by the 

 galvanic current, and the surface and thickness of the porous 

 diaphragms employed. 



In order to investigate this, various portions of the clay- 

 cylinder in the above- described apparatus were successively over- 



