CONTENTS (continued). 



February 18, 1886. 



PAGE 



I. Observations on the Radiation of Light and Heat from Bright and Black 



Incandescent Surfaces. By Mortimer Evans, M.Inst.C.E., F.R.A.S. . 207 



IT. On a Thermopile and Galvanometer combined. By Professor George 



Forbes, M.A • . 217 



February 25, 1886. 



I. On a Comparison between Appai*ent Inequalities of Short Period in Sun- 



spot Areas and in Diurnal Declination-ranges at Toronto and at Prague. 

 By Balfour Stewart, M.A., LL.D., F.R.S., and William Lant 

 Carpenter, B.A., B.Sc 220 



II. On Radiant Matter Spectroscopy : Note on the Earth Ya. By William 



CrookeSj F.R.S 236 



March 4, 1886. 



List of Candidates 237 



I. The Bakerian Lecture. — Colour Photometry. By Captain Abnet, 



R.E., F.R.S. , and Major- General Festing, R.E 238 



March 11, 1886. 



I. The Influence of Stress and Strain on the Physical Properties of Matter. 

 Part I. Elasticity — continued. The Internal Friction of Metals. By 

 Herbert Tomlinson, B.A. 210 



II. On Systems of Circles and Spheres. By R. Lachlan, B.A., Fellow of 



Trinity College, Cambridge 242 



III. Effects of Stress and Magnetisation on the Thermoelectric Quality of 



Iron. By Professor J. A. Ewing, B.Sc, University College, Dundee. 24S 



March 18, 18S6. 



I. The Relationship of the Activity of Vesuvius to certain Meteorological 



and Astronomical Phenomena. By Dr. H. J. Johnston-Layis . . 248 



II. On an Apparatus for connecting and disconnecting a Receiver under 

 Exhaustion by a Mercurial Pump. By J. T. Bottomlet, M.A., 

 F.R.S.E * 249 



III. Comparative Effects of different parts of Hie Spectrum on Silver Salts. 



By Captain W. do W. Abnet, R.E., F.R.S 251 



March 25, 1886. 



I. Abstract of Paper upon the Minute Anatomy of the Brachial Plexus. Bj 



W. P. Herring ham, M.B., M.R.C.P .255 



II. On the Changes produced by Magnetisation in the Length of Iron Wires 



under Tension. By Suelford Bidwell, M.A., LL.B. . . . 257 



