CONTENTS. 



PAET I. (1885-86.) 



PAGK 



I. The A tomic Weight of Tungsten. By John Waddell, B. A. , D. Sc. , 1 



II. On Dew. By John Aitken, F.R.S.E., .... 9 



III. On the Foundations of the Kinetic Theory of Gases. By Professor 



Tait, Sec. RS.R, . ... 65 



IV. The Eggs and Larva? of Teleosteans. By J. T. Cunningham, B.A., 



F.RS.E. (Plates I. -VII), ..... 97 



V. On the Fructification of some Ferns from the Carboniferous For 

 mation. By Robert Kidston, F.R.S.E., F.G.S. (Plates VIII., 

 IX.), . * .137 



VI. On the Colours of Thin Plates. By the Right Hon. Lord 



Rayleigh, Hon. F.R.S.E. (Plate X.), . . 157 



VII. On the Electrical Properties of Hydrogenised Palladium. By 

 Cargill G. Knott, D.Sc. (Eclin.), F.R.S.E., Professor of 

 Physics, Imperial University, Tokay o, Japan. (Plate XI.), . 171 



VIII. The Electrical Resistance of Nickel at High Temperatures. By 

 Cargill G. Knott, D.Sc. (Edin.), F.R.S.E., Professor of 

 Physics, Imperial University, Tokay o, Japan. (Plate XII.), . 187 



IX. The Formation of the Germinal Layers in Teleostei. By George 

 Brook, F.R.S.E., F.L.S., Lecturer on Comparative Embryology 

 in the University of Edinburgh. (Plates XIII. -XV.), . 199 



