V 



Page 



On a Thermopile and a Galvanometer combined. By Professor George 

 Forbes, M.A 217 



February 25, 1886. 



On a Comparison between Apparent 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 Car- 

 penter, B.A., B.Sc , 220 



On Badiant Matter Spectroscopy : Note on the Earth Y*. By William 

 Crookes, F.E.S 236 



March 4, 1886. 



List of Candidates 237 



The Bakeriax Lecture. — Colour Photometry. By Captain Abney, 

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



March 11, 1886. 



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 240 



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

 Trinity College, Cambridge 242 



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

 By Professor J. A. Ewing, B.Sc, University College, Dundee 246 



March 18, 1886. 



The Relationship of the Activity of Vesuvius to certain Meteorological 

 and Astronomical Phenomena. By Dr. H. J. Johnson-La vis 248 



On an Apparatus for connecting and disconnecting a Eeceiver under 

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

 F.E.S.E 249 



Comparative Effects of different parts of the Spectrum on Silver Salts. . 

 By Captain W. de W. Abney, E.E., F.E.S. ... 251 



March 25, 1886. 



Abstract of Paper upon the Minute Anatomy of the Brachial Plexus. By 

 W. P. Herringham, M.B., M.E.C.P 255 



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

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



Remarks on the Cloaca and on the Copulatory Organs of the Amniota. 

 By Dr. Gadow 266 



