On Resistance to Electric Current 



The same again. 



7 



4'9 

 5' 1 



seemed rather less. 



sensib. greater. 6-05 supposed right. 



seemed rather greater. 



Sat. sol. conducts 1-88 times better than salt in n. 



The same again. 



4'9 



7 



seemed rather greater, but doubtful. 



sensib. greater. 



sensib. less. 5'95 supposed true. 



Sat. sol. conducts 1-92 times better than salt in n. 



629] Salt in 142 put in tubes 5 and 15 in order to find what power of velocity 

 the resistance is proportional to. 



Electrometer = 3. [R. = 579-] 



plainly less. 



do. 



scarce sensib. less. supp osed right. 



plainty greater. 



DO. 



sensib. greater, 

 seemed rather greater, 

 sensib. less. 



Therefore log. vel. in 15 by do. in 5 = 1-2122, 

 log. length in 5 by do. in 15 = 1-1829. 



= -976 power of velocity. 



Therefore resistance is as 

 The same repeated. 



1-2122 



15 



3 

 2-6 



2-7 



sensib. less. 



hardly sensib. 



seemed sensib. greater. 



sensib. greater. 2>g5 supposed true. 



hardly sensib. 



Log. vel. in 15 by D in 5 = 1-2122, 

 Log. length in 5 by D in 15 = 1-2122. 

 Therefore resistance is directly as velocity*. 



* (This is the first experimental proof of what is now known as Ohm's Law.] 



