34 THE ROYAL SOCIETY OF CANADA 
Potential acquired in 184-6 secs by plate N with saturation current 
=-75 volts or -75/300 E. S. Units. 
Capacity of electrical system—2411 cms. 
Charge acquired per sec. —-75X2411X 1 B.S. U. 
300 184-6 
°75 X2411 1 1 
." No. of ions =———-——— X —-— X ——— 
300 184-6 4-65x107° 
.*. N==No. of @ particles — 
emitted per sec. 
-75 X2411 1 1 1 
= $$ K —_ K —____— X — =4898. 
300 184-6 4:65<107 1-6210° 
Calculation II. Determination of number of © particles emitted 
per second. 
Initial rate of increase in potential of plate N and attached elec- 
trical system=—-107 volts per hour. 
Capacity of electrical system—260 cms. 
Positive Charge acquired per second =: 107 1, +260 ES 
.". No of Elementary units of Electricity gained per sec. 
eg i 260 
300 3600 4-65 x10°" 
—53170 
Let N, denote the number of delta particles leaving the plate N 
per second, then if each delta particle carried a negative charge of 4-6 X 
10719 E. S. U. and each @ particle carried a positive charge of twice 
this amount we have 
N,—2N, =53170 
or N,—53170 +2N, 
—53170 +866 
—54036 
It follows then that Ny AUPE ont à 
N 433 
1 
