( 4 ) 



Vol. XXXIII. 



Ko. 1. Photo-electric Discharge from Leaves. 



J. A. McClelland, d.sc, f.r.s., and Rev. R. FitzGerald, m.sc. 



2. The Mobilities of Ions produced by spraying Distilled Water. 



J. J. Nolan, m.sc. 



3. The Nature of the Ions produced by Bubbling Air through Mercury. 

 J. A. McClelland, d.sc, f.k.s., and P. J. Nolan, m.sc. 



4. On Periodic Conformal Curve-Factors and Corner-Factors. 

 J. G. LEATHEM, M.A.. D.sc. 



5. The Large Ions and Condensation-Nuclei from Flames. 

 H. Kennedy, m.a., m.sc. 



6. Impact in Three Dimensions. 

 M. W. J. Fkv, m.a., f.t.c.D. 



IS. 



6d. 

 6d. 



Vol. XXXIV 



No. 1. On the Simultaneous Formulation of Two Linear Vector Functions. 



Fkank L. Hitchcock, PH.D. 6d. 



., 2. On Two-dimensional Fluid Motion, with Free Stream-Lines, Past an Obstacle 

 of Curved Outline. 



J. G. Leathem, m.a., d.sc. is. 



., 3. Electrification by Friction. 



J. A. McClelland, d.sc, f.r.s., and Rev. C. J. Power, s.j., m.sc. 6d. 



4. The Ions produced by Bubbling .Air through Alcohol. 



J. A. McClelland, ij.sc., and H. J. Nolan, m.sc. 6d. 



., 5. On the Equation of the Tangent at a Given Point on a Uni-Nodal > 

 Quart ic Cur\-e. 



Rev. W. R. W. Roberts, D.D.,s.F.r.c.D. \ 6d. 



,, 6. On the Symmetrical Optical Instrument. 



H. C. Plimmer, M.a. 



Vol. XXX\' (Current Volume). 



No. 1. The Nature of the Ions Produced by Phosphorus. 



J. A. McClelland, d.sc, f.r.s., and P. J. Nolan, m.sc. 



,, 2. Further Observations of the Electric Charge on Rain. 



J. A. McClelland, u.sc, f.r.s., and A. Gilmolr, m.sc. 



6d. 

 6d. 



[List of Papers in the other Sections — B. BiologicaJ, Geological, and Chemical 

 Science ; and C. Archaeology, I.ingnistic, and Literature— may be had on 

 application ] 



Hodges, Figgis, & Co., jo, Nassau Street, Dublin ; and 

 Williams & Norgate, 14, Henrietta Street, Covent Garden. London, W.C. 



