PKOCEEDINGS OF 

 THE KOYAL SOCIETY. 



vol. xlvi. No. 280. 



ft.. V\ 



jyyy CONTENTS. 



May 2, 1889. 



PAGE 



L Note on the Effect produced by Conductors in the Neighbourhood of a 

 "Wire on the Bate of Propagation of Electrical Disturbances along it, 

 with a Determination of this Rate. By J. J. Thomson, M.A., E.B.S., 

 Cavendish Professor of Experimental Physics, Cambridge . . 1 



II. Besearches in the Chemistry of Selenic Acid and other Selenium Com- 

 pounds. By Sir Charles A. Cameron, M.D., E.B.C.S.I., V.P.I.C., 

 Professor of Chemistry and Hygiene, B.C.S.I., and John Macallan, 

 F.I.C., Demonstrator of Chemistry, B.C.S.1 13 



III. On the Wave-length of the chief Fluting seen in the Spectrum of Manga- 



nese. By J. Norman Lockyer, E.B.S. 35 



IV. The Accurate Determination of Carbonic Acid and Moisture in Air. By 



J. S. Haldane, M.A., M.B., and M. S. Pembret, Pell Exhibitioner of 

 Christ Church, Oxford. (From the Physiological Laboratory, Oxford). 40 



V. On the Spectrum, "Visible and Photographic, of the Great Nebula in 

 Orion. By William Htjggins, D.C.L., LL.D., F.B.S., and Mrs. 

 Hugguns (Plate 1) . . . . . . . 40 



List of Presents . . . . .61 



May 9, 1889. 



I. On the Magnetic Botation of the Plane of Polarisation of Light in doubly 



refracting Bodies. By A. W. Ward ....... 65 



II. Revision of the Atomic Weight of Gold. By J. W. Mallet, F.R.S., 



Professor of Chemistry in the University of Virginia . . 71 



III. Zirconium and its Atomic Weight. By G. H. Bailey, D.Sc, Ph.D., The 



Owens College , . 74 



IV. Magnetic and other Physical Properties of Iron at a High Temperature. 



By John Hopkinson, F.R.S . 87 



V. Determining the Strength of Liquids by means of the Voltaic Balance. 



By G. Gore, LL.D., F.R.S 87 



VI. On Films produced by Vaporised Metals and their Applications to 

 Chemical Analysis.— Preliminary Notice. By W. N. Hartley, F.R.S., 

 Royal College of Science, Dublin . . . . . . .88 



List of Presents . . / 90 



For continuation of Contents see 2nd page of Wrapper. 



Price Six Shillings and Sixpence. 



