Memoirs presented to the Cambridge philosophical society on the occasion of the jubilee of Sir George Gabriel Stokes, bart., Hon. LL. D., Hon. SC. D., Lucasian professor.

vi CONTENTS.
PAGE
XIII. Demonstration of Green's Formula for Electric Density near the Vertex of a
Riight Cone. By H. M. MACDONALD, M.A., Fellow of Clare College............... 292
XIV. On the Effects of Dilution, Temperature, and other circumstances, on the Absorption
Spectra of Solutions of Didymium and Erbium Salts (Plates 3-23). By
G. D. LIVEING, M.A., F.R.S., Professor of Chemistry................................. 298
XV. The Echelon Spectroscope. By A. A. MICHELSON............................................ 316
XVI. On Minimal Surfaces. By H. W. RICHMOND, M. A., Fellow of King's College,
Cambridge........................................................................... 324
XVII. On Quartic Surfaces which admit of Integrals of the first kind of Total
Differentials. By ARTHUR BERRY, M.A., Fellow of King's College, Cambridge' 333
XVIII. An Electromagnetic Illustration of the Theory of Selective Absorption of Light by
a Gas. By HORACE LAMB, M.A., F.R.S., Professor of Mathematics at the Owens
C ollege, M anchester................................................................................ 348
XIX. The Propagation of' Waves of Elastic Displacement along a Helical Wire. By
A. E. H. LOVE, M.A., F.R.S., Sedleian Professor of Natural Philosophy in
the U niversity of Oxford..................................................................... 364
XX. On the construction of a 3lodel showing the 27 lines on a Cubic Su:efiace (Plates
XXIV, XXV). By H. M. TAYLOR, M.A., F.R.S., Fellow of Trinity College... 375
XXI. On the Dynamics of a System of Electrons or Ions: and on the Influence oj
a Llfagnetic Field on Optical Pheno2mena. By J. LARMOR, M.A., F.R.S., Fellow
of St John's College.............................................................................. 380
XXII. On the Theory of Functions of several Complex Variables. By H. F. BAKER, M.A.,
F.R.S., Fellow of St John's College.................................................. 408
I n d ex................................................................................................ 4 4 5
PLATES.
Frontispiece. Portrait of Sir George Gabriel Stokes, Bart.
I, 1I, illustrating Professor Schuster's paper, page 107.
3-23 (contained in 14 leaves) illustrating Professor Liveing's paper, page 298.
XXIV, XXV, illustrating Mr H. M. Taylor's paper, page 375.
ERRATA.
Page 210, line 5 from the top, omit the equation AB. CD = kBC. DA.
332. In regard to ~~ 7-11, reference ought to have been made to the results of
Lie, Math. Ann. xiv. pp. 373-378, or to Darboux ~ 325, from which the special type of surfaces
considered might also be derived.