Vol. XXXIII. 



No. 1. Photo-electric Discharge from Leaves. 



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

 ,, 2. The Mobilities of Ions produced by spraj-ing Distilled Water. 



J. T- XOLAX, iL.'^C. 

 ,, 3. The Nature of the Ions produced by Bubbling Air through Mercurj'. 

 J. A. McClellakd, d.sc, F.K.S., and P. J. Nolan, m.sc. 



,, 4- On Periodic Conformal Cur\-e- Factors and Corner-Factors. 



J. G. I.EATHEM, M.A.. D.SC. IS. 



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



H. Kennedy, m.a., m.sc. 6d. 



,, 6. Impact in Three Dimensions. 



M. \V. J. FkV, M.A., F.T.C.D. 6d. 



Vol. XXXIV 



No. 1. On the Simultaneous Formulation of Two Line.ir Vector Functions. 



Fkank L. HllCHCOCK. PH.D. 6d. 



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

 of Cur\'ed Outline. 



J. G. I.KATHl.y, il.A., D.SC. IS. 



„ 3. Electrification by Friction. 



J. A. McClem AND, D.sc, K.k.s., and Rev. C. J. Power, s.j., m.sc 6d. 



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



J. A. McClelland, d.sc, and P. J. Nolan, m.sc. 6d. 



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

 Quartic Cur\e. f 



Rev. \V. R. W. RoiiEKTs, D.D., s.F.r.c.D. > 6d. 



,, 6. On the Symmetrical Optical ln^trument. ) 



H. C. Fl I MMER. M.A. 



\oi . XXX\' (Current Volume). 



No. 1. 1 he Natuic of the Ions Produced by Phosphorus. 



J. A. McClkli AND, D.sc, F.K.S., and P. J. Nolan, m.sc 6d. 



,. 2. Further Obser\-ations of the Electric Charge on Rain. 



J. A. McClelland, d.sc, f.r.s., and A. Gilmocr, m.sc 6d. 



„ 3. A Study of the Vector Product IVaSfl. 



Frank I- Hitchcock, ph.d. is. 



,, 4. The Nature of the Ions produced in Air by Radio-Aclive Bodies. 



1. 



J J. NOt.AN. M.A., D.SC. 



[List of Papers in the other Sections- B. Biological, Geological, and Chemical 

 Science ; and C Archaeology, Linguistic, and Literature— may be had on 

 application ] 



SoUiy 



Hodges, Figgis, & Co., 20, Nassau Street, Dublin ; and 



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



