May, igi6 1 S 3 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



Volume XXXIII, Section A, Nos. 1^ 2^ 3 



J. A. McClelland and eev. e. fitzgeeald. 



I, — Photo-Electkic Discharge from Leaves. 



J. A. McClelland and p. j. nolan. 



IL — The Nature of the Ions Produced by Bubbling Air through Mercury. 



J. J. NOLAN. 

 III. — The Mobilities of Ions Produced by Spraying Distilled Water. 



DUBLIN 



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