26 JUL 1887 



TRANSACTIONS 



OK THE 



EOYAL SOCIETY OF EDINBURGH. 



VOL. XXXIII. PART I.— FOR THE SESSION 1885-86. 



CONTENTS. 



Page 

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



II. On Dew. By Mr John Aitken, ...... 9 



III. On the Foundations of the Kinetic Theory of Gases. By Professor Tait, . . 65 



IV. The Eggs and Larvae of Teleosteans. By J. T. Cunningham, B.A. (Plates I. to 



VII.), 97 



V. On the Fructification of some Ferns from the Carboniferous Formation. By 



Robert Kidston, F.R.S.E., F.G.S. (Plates VIII., IX.), . . .137 



VI. On the Colours of Thin Plates. By Lord Rayleigh. (Plate X.), . . 157 



VII. On the Electrical Properties of Hydrogenised Palladium. By Cahgill G. Knott, 

 D.Sc. (Edin.), F.R.S.E., Professor of Physics, Imperial University, Tokayo, 

 Japan. (Plate XL), ........ 171 



VIII. The Electrical Resistance of Nickel at High Temperatures. By Cargill G. Knott, 

 D.Sc. (Edin.), E.R.S.E., Professor of Physics, Imperial University, Tokayo, 

 Japan. (Plate XII.), . . . . .187 



IX. The Formation of the Germinal Layers in Teleostei. By George Brook, F.L.S. 

 Lecturer on Comparative Embryology in the University of Edinburgh. 

 (Plates XIII. to XV.), . . . . . . .199 



X. On the Structure of Suberites dotnuncula, Olivi (0 .#.), together with a Note on 

 pecidiar Capsules found on the Surface of Spongelia. By J. Arthur Thomson. 

 (Plates XVI., XVII.), 241 



XL The Reproductive Organs of Bdellostoma and Teleostean Ovum, from West Coast of , 



Africa. By J. T. Cunningham, B.A., ..... 247 



[Issued May SI, 1887 A 



