ROVAI. 1 IM S II ACA DKMY 



rR()Cl':RDINGS. 

 SI'-.CIION A. 



[l\TATHK^rATICAI., ASTKONO.MICAI., ANM) PlIYSICAF. SCIENCE.] 



Vol. XXVIII. 



No. 1. On the Motion of an Electrified Sphere. 



A. W. Conway, f.r.s. 6d. 



,, 2. Contributions to the Theory of Screws. 



Sir Rohkrt Ball, f.r.s. 2s. 



,, 3. The Symbolical Expression of liliminants. 



Rev. W. R. W. Rohf.rts, d.d. 6d. 



Vol. XXIX. 



No. 1. On the Application of Quaternions to some recent Developments of Electrical 

 Theory. 



A. W. CONWAV, F.K.S. 6d. 



2. E.\tensions of Fourier's and the Bessel- Fourier Theorems. Second Paper. 

 W. M'F. Okr, f.r.s. 6d. 



3. The Linear Complex, and a Certain Class of Twisted Curves. 

 Rev. M. F. Egan, si. a. is. 



4. Jhe Differentiation of Quaternion Functions. 



K. T. Wang. 6d. 



5. The Electric Charge on Rain (Part I). 

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



6. Some DitTerential Properties of the Orthogonal Trajectories of a Congruence 

 of Curves, with an Application to Curl and Divergence of Vectors. 



R. A. P. I^OGERS, M.A. 6d. 



Vol. XXX. 



No. 1. The Riemann Integral and Measurable Sets. 



M. J. Conkan, m.a. 6d. 



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

 Girders due to a Locomotive. 



■]'. Alexandf.r, m.a.l 6d. 



,, 3. Magnetic Resolution of the Spectrum Lines of Niobium. 



R. Jack, d.sc. 6d. 



,, 4. The Electric Cliarge on Rain (Part (I). 



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



5. The r.arge Ions in the Atmosphere. 

 f. A. McClelt.and, d.sc, f.k.s., and H. Kennedy, m.sc. 6d. 



6. The Quadratic Vector Function. 



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



Vol. XXXII. 



No. 1. The Large Ions in the Atmosphere. 



H. Kennedy, m.sc. 6d. 



2. Note on the Use of Conjugate I'-unctions in some Dynamical Problems. 

 H. C. PLUiMMER, ir.A. 6d. 



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



i\L W. J. Frv, ai.a. (,d. 



4. On Doublet Distributions in Potential Theory. 

 J. G. Lea 1 HEM, d.sc. 6d. 



5. The Electrical Conductivity of Powders in Thin Layers. 

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



6. Integral Equation proposed by Abel. \ 

 Ri:y. p. J. BuowNK, m.a. | 



7. A 3 dimensional Complex Variable. 1 

 S. B. Keli.i.hek, m.a. / 



