CONTENTS of N° 256.— Fourth Series. 



XXXIX. Observations on the Temperature of the Human Body at 

 various Altitudes, in connexion with the act of Ascending. By Wil- 

 liam Marcet, M.D., F.R.S., Assistant Physician to the Hospital for 

 Consumption and Diseases of the Chest, Brompton page 329 



XL. On that portion of the Report of the Astronomer to r the Ma- 

 dras Government on the Eclipse of August 1868 which recounts his 

 Spectroscopic Observations. By J. Herschel, Lieut. R.E 338 



XLI. Short Account of the Winterings in the Arctic Regions 

 during the last fifty years. By C. Borgen and R. Copeland, Astro- 

 nomers and Physicists to the second German Polar Expedition .... 340 



XLII. On a New Spectroscope, together with contributions to the 

 Spectral Analysis of the Stars. By F. Zollner 360 



XLIII. On the Structure of the Human Ear, and on the Mode in 

 which it administers to the Perception of Sound. By R. Moon, 

 M.A., Honorary Fellow of Queen's College, Cambridge 369 



XLIV. Theory of the Voltaic Pile. By W. Kencely Bridgman, 

 L.D.S 377 



XLV. Proceedings of Learned Societies : — 



Royal Society: — Prof. A. W. Church on Turacine ; Mr. W. 

 Crookes on a New Arrangement of Binocular Spectrum-Micro- 

 scope, and on some Optical Phenomena of Opals ; Sir W. 

 Thomson on a new Astronomical Clock, and a Pendulum-go- 

 vernor for Uniform Motion ; Dr. W. A. Miller on a Self- 

 registering Thermometer adapted to Deep-sea Soundings. 383-399 



Geological Society: — Mr. W. B. Dawkins on the British 

 Postglacial Mammalia ; Mr. J. W. Judd on the Origin of the 

 Northampton Sand ; Prof. H. Coquand on the Cretaceous 

 Strata of England and the North of France ; Mr. W. Carru- 

 thers on the Structure and Affinities of Sigillaria and allied 

 genera; Dr. H. A. Nicholson on the British Species of the 

 Genera Climacograpsus, Diplograpsus, Dicranograpsus, and 

 Didymograpsus ; Mr. F. O. Adams on the Coal-mines at 

 Kaianoma ; Mr. M. Morgans on a peculiarity of the Bren- 

 don-Hills Spathose Ore-veins • • 399-403 



XLVI. Intelligence and Miscellaneous Articles: — 



On the Emission and Absorption of Heat radiated at Low Tem- 

 peratures, by G. Magnus 403 



On the limits of the Magnetization of Iron and Steel, by Prof. 

 A. Waltenhofen 404 



On the Reflection of Heat from the surface of Fluor-spar and 

 other Bodies, by G. Magnus 405 



On the Luminous Effects produced by Electrostatic Induction in 

 Rarefied Gases. — Leyden Jar with Gaseous Coatings, by M. 

 F. P. Le Roux 407 



* # * It is requested that all Communications for this Work may be addressed, 

 post-paid, to the Care of Messrs. Taylor and Francis, Printing Office, Red 

 Lion Court, Fleet Street, London. 



