A CONTINUOUS RECORD OF ATMOSPHERIC NUCLEATION. 



hydrant water passing h under high pressure reaches the jet /, placed suitably 

 within A. The water nuclei thus producible may be tested either by coronas 

 or electrically by passing theni into the condenser, C. Compare Chapter II. 



IONIZATION OF PHOSPHORUS NUCLEI COLLECTED OVER WATER. 



8. Data. — The current through the condenser follows a law similar to 

 Ohm's. The constant appropriate for the comparison of the data may there- 

 fore be computed logarithmically. If C is the capacity of the apparatus in 

 parallel, E the potential of the condenser, i the radial electric current through it, 

 R its ohmic resistance for the given medium, s the deflection at the electrometer, 



(dE/dt)/E=={ds/dt)/s=i/CR, or d{\og s)/dt = .434/CR = a 

 where common logarithms are used and a is the constant sought. Thus a varies 

 directly with the conduction of the ionized medium traversing the condenser. 



TABLE I.— IONIZATION OF PHOSPHORUS NUCLEI. 

 dV/dt (IN LITERS PER MIN.) VARIABLE. NEGATIVE CHARGE. 



• Nuclei put into receiver (A) by preliminary exhaustion. 



2 In this and the other cases fresh nuclei were aspirated into A by passing room air over phosphorus. 



