CONTENTS 



Fkonti.spifxe. — Dallon's Tomb in Ardwick Cemetery, Manchester. 



MEMOIRS. 



I. On the Electrical Resistance between opposite sides of a Quadri- 

 lateral, one Diagonal of which bisects the other at right angles. 

 By Charles H. Lees, D.Sc pp. i — 3 



II. On the question of Irish Influence on early Icelandic Literature, 

 illustrated from the Irish MSS. in the Bodleian Library. By 

 Winifred Faraday, B.A. pp. i — 22 



III. Correction in the Wilde Lecture of 1897, " On the nature of the 



Rontgen Rays." By Sir G. G. Stokes, Bart., F.R.S... p. i 



I\'. Report on the MoUusca of the " Jackson- Harmsworth" Expedi- 

 tion to Franz-Joseph Land (1S96-7), and of the "Andrew 

 Coats" Cruise (1898) to Kolguev, etc. By James Cosmo 

 Melvii.l, M.A., F.L.S., and Robert Standen ... pp. i— -14 



\'. On the Mechanical Principles of Flight. (The Wilde Lecture.) 



By the Rt. Hon. Lord Raylkigh, F.R.S. pp. i — 26 



VI. Geometrical Representation of the Relation between Wave- 

 Velocity and Group-Velocity. By Horace Lamb, M. A., 

 F.R.S pp. 1—5 



VII. The Formation of Minerals in Granite. By C. E. Stromeyer, 

 M.Inst.C.E 



VIII. Notes on some Jurassic Plants, in the Manchester Museum, 

 A. C. Seward, M.A., F.R.S. Plates i to 4 



IX. On the Conditions for the Propagation of a Solitar)' Wave. 

 R. F. GWYTHKK, M.A 



X. On the Motion of the Fluid Particles in a Class of Cases of 



Steady Motion. By R, F. Gwyther, M.A pp. i — 4 



XI. On Aerial Locomotion. By Henry Wii.de, F.R.S. ... pp. i — 16 



XII. Grating Films and their Application to Colour Photography. By 



Thomas Thorp pp. i — 8 



