Calibrating Fine Capillary Tubes. 38D 



Tube B at 25° C. Length of Capillary = 176*14 rain, 





Comparison 

 Resistance. 



Resistance of 

 Capillary Thread. 



1st Filling 



12-103 ohms 

 12203 



12-203 



12103 



12-203 

 L2-103 



12-303 



12*256 ohms 

 12259 



12-262 



12259 



12-263 

 12*259 



12-266 



2nd Filling 





3rd Filling 



Beset 



Mean Resistance 12-260 ohms 



Tube C at 25° C. Length of Capillary -= 210'9G mm, 





Comparison 

 Resistance. 



Resistance of 

 Capillary Thread. 



1st Fillino- 



15*403 ohms 

 15-303 



15-503 



15-503 

 15-403 



15-303 



15-303 

 15-403 

 15-503 



15-503 

 15-403 

 15*303 



15-432 ohms 

 15-425 



15-434 



15-436 

 15-434 



15-428 



15-430 

 15-435 

 15*438 



15-436 

 15*433 

 15426 



Reset 



2nd Filling 



Reset 





4th Filling 







Mean Resistan 



;e 15*432 ohms 



The mean resistances found for tubes B and C are probably 

 correct to 0'03 per cent. 



