CONTENTS. 



I. Supplement to a Paper " On the Theoretical Explanation of an apparent new 



Polarity in Light." By G. B. Airy, Esq. M.A. F.R.S., Astronomer 

 R^(^l page 1 



II. Contributions to Terrestrial Magnetism. — No. II. By Lieut. -Colonel Edward 



^ABm^,R.A.V.P.R.S 11 



III. On Ground Gru, or Ice formed, under peculiar circumstances, at the bottom of 



Running PTater. By James Farquharson, LL.D. F.R.S., Minister of the 

 Parish of Alford 37 



IV. On a Remarkable Property of the Diamond. By Sir David Brewster, K.H. 



D.C.L. F.R.S. and F.P.R.S.Ed 41 



V. On the Phenomena of Thin Plates of Solid and Fluid Substances exposed to 



Polarized Light. By Sir David Brewster, K.H. D.C.L. F.R.S. and 

 V.P.R.S.Ed. 43 



VI. Memoir of the Case of a Gentleman bom blind, and successfully operated upon 



in the ISth year of his age, with Physiological Observations and Experiments. 

 By J. C. August Franz, of Leipzic, M.D., M.R.C.S., &jc. Communicated by 

 Sir Benjamin C. Brodie, Bart., F.R.S., S^c 59 



VII. Additional Note on the Contraction of Voluntary Muscle in the Living Body. 



By William Bowman, Esq., F.R.S. , Demonstrator of Anatomy in King's 

 College, London, and Assistant Surgeon to the King's College Hospital . 69 



VIII. Note on an inequality in the Height of the Barometer, of which the Argument 



is the Declination of the Moon. By Sir J. W. Lubbock, Bart., Treas. and 

 F.P.R.S 73 



IX. On the Calculation of Attractions, and the Figure of the Earth. By C. J. 



Hargreave, B.A. of University College, London. Communicated by John T. 

 Graves, Esq., A.M. F.R.S., of the Inner Temple 75 



