( 4 



Vol. XXX. 



No. 1. The Riemann Integral and Measurable Sets. 



M. J. COKR.A.X, XI. A. 6d. 



2. On the Graphical Construction of Maximum Bending-Moments on Short 

 Girders due to a Locomotive. 



T. Alexander, m.a.i. 6d. 



3. Magnetic Resolution of the Spectrum Lines of Niobium. 



R. Jack, d.sc. 6d. 



4. The Electric Charge on Rain (Part II), 

 J. A. McClelland, d.sc, f.r.s., and J. J. Nolan, Jt.sc. 6d. 



5. The Large Ions in the Atmosphere. 

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



6. The Quadratic Vector Function. 

 Rev. T. Roche, m.a. 6d. 



Vol. XXXII. 



1. The Large Ions in the Atmosphere. 



H. Kennedy, m.sc. 6d. 



2. Note on the Use of Conjugate Functions in some Dynamical Problems. 



H. C. Plumher, m.a. 6d. 



3. Real and Complex Numbers considered as Adjectives or Operators. 



M. W. J. Fry, m.a. 6d. 



4. On Doublet Distributions in Potential Theory. 



J. G. LEATHEil, D.SC. 6d. 



5. The Electrical Conductivity of Powders in Thin Layers. 



J. A. McClelland, d.sc, e.r.s., and J. J. Dowling, m.a. 6d. 



6. Integral Equation proposed by Abel. A 



Rev. p. J. Bro^vne, m.a. / g^_ 



7. A 3 -Dimensional Comple.x Variable. j 



S. B. Kelleher, m.a. / 



Vol. XXXIII (Current Volume). 



1. Photo-Electric Discharge from Leaves. 



J. A. McClell.-vnd, 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.r.s., and P. J. Nolan, m.sc. 



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



J. G. Leathem, ji.a.. d.sc 



y IS. 



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

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

 application.] 



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Hodges, Figgis, & Co., Ltd., 104, Grafton -street, Dublin ; and 



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



