PROCEEDINGS OF if MAR 3 ^89 

 THE ROYAL SOCIETY. 



VOL. XLY1I. No. 286- 



CONTENTS. 

 December 5, 1889. 



PAGE 



I. Remarks on Mr. A. W. Ward's Paper " On the Magnetic Rotation of 

 the Plane of Polarisation of Light in doubly refracting Bodies." By 

 O. Wiener and W. Wedding, Physikalisches Institut, Strassburg i. E. 1 



II. Researches on the Chemistry of the Camphoric Acids. By J. E. Marsh, 

 B.A., Demonstrator of Organic Chemistry at the University Laboratory, 

 Oxford 6- 



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



Part III. Magnetic Induction (continued). The Internal Friction of 

 Iron, Nickel, and Cobalt, studied by means of Magnetic Cycles of very 

 minute Range. By Herbert Tomlinson, B.A., E.R.S. . . .13 



IV. A Compound Wedge Photometer. By E. J. Spitta, L.R.C. Phys. Lond. 15 

 List of Presents 18 



December 12, 1889. 



I. The Relation of Physiological Action to Atomic Weight. By Miss H. J. 

 Johnstone, University College, Dundee, and Thos. Carnelley, Pro- 

 fessor of Chemistry in the University of Aberdeen . . . .21 



II. An experimental Investigation into the Arrangement of the excitable 

 Fibres of the Internal Capsule of the Bonnet Monkey (Macacus sinicus) . 

 By Charles E. Beevor, M.D., F.R.C.P., and Victor Horsley, B.S., 

 F.R.S. (from the Laboratory of the Brown Institution) \ . . .21 



III. On the Effect of the Spectrum on the Haloid Salts of Silver. By Captain 



W. de W. Abney, C.B., R.E., D.C.L., F.R.S., and a. S. Edwards, C.E. 22 



IV. Magnetic Properties of Alloys of Nickel and Iron. By J. Hopkinson, 



F.R.S .23 



List of Presents . ■. . .25 



For continuation of Contents see 2nd page of Wrapper. 



Price Two Shillings and Sixpence. 



Feb 18, 1890. 



