256 



Mr Townsend, On Electricity in Gases [Feb. 8, 



per minute by the inductor into which the gas enters after 

 leaving the acid, and the total charge crossing from B to the 

 sulphuric acid can be calculated. 



20. This method gave very consistent results, and in the case 

 of oxygen agreed fairly well with those obtained by the first 

 method. The following is a list of the observations made : C the 

 current through the cell in amperes, the temperature of the 

 bath in which the bottles A and B were immersed, T the time 

 the current was on, 8 the discharging power, and W the increase 

 of weight of the sulphuric acid bulbs, N the number which gives 

 the charge in electrostatic units per degree of the scale, / the 

 charge per minute on the inductor in divisions of the scale. 



When the weight of the moisture, carried across due to the gas 

 being saturated, is subtracted from the increase of weight of the 

 sulphuric acid bulbs we get the following numbers, which give 

 the connection between the charge per c.c. and the weight of the 

 cloud per c.c. 



Positive oxygen. 



Weight per c.c. 

 in grammes 



Charge per c.c. in 

 electrostatic units 



3-13 xl0~ 3 

 4-06 xlO" 3 



Negative oxygen. 



2-42xl0- 3 



2-62 x 10- 3 

 3-0 xlO" 3 

 Positive hydrogen. 



2-7 xlO" 3 



2-4 xl0- :! 



15 xlO" 6 

 20'4 x 10-° 



18-4 x 10-° 

 19-4xl0- 6 

 21-5 XlO -6 



10-8x10-° 

 9-9xl0- 6 



1 By first 

 J Method 



