1897.] 



Newly Prepared Gases. 



361 



the volume of the tube. The following values of re, and n 2 were 

 obtained : 



The rate q at which the gas is supplied to the tube is '85 c.c. 

 per second: so that (p — p)x51 is the charge given to the tube 

 per minute as the gas passes through it, and is proportional to n lf 



and a x V i >s proportional to n. 2 , where V, the volume of the 



tube, is 60'4 cubic centimetres. 



Thus we get the following values for — — - and p u : 



(17) The ratio — — - was also found to increase when the 

 P 

 current through the electrolyte diminished, thus showing that the 

 ratio depended upon the rate at which the gas is supplied to the 

 tube. Another tube of equal length and 1"12 centimetres in 

 diameter was examined by similar methods, and it was found to 

 have a far less discharging power than the larger tube ; so that, 

 when the supply q and density p Q are given, the smaller the bore 

 of the tubing that is used to convey the gas from one vessel to 

 another, the less will be the loss of the charge. The above results 



showing the dependence of - on p are important as we see 



from the formula 



po-p _ 47re p V 



that the increase in the charge due to heating the cell arises from 

 an increase in the number of carriers with the same charge, and 



