Vlll CONTENTS OF VOL. XXXIV. FOURTH SERIES. 



Page 



Mr. G. J. Stoney on the Solar Eclipse, August 1868 502 



Dr. Atkinson's Chemical Notices from Foreign Journals .... 506 



Mr. T. GafBeld on the Action of Sunlight on Glass 514 



Prof. J. C. Poggendorff on a new Electrical Phenomenon of 



Motion 533 



Notices respecting New Books : — 



Mr. C. H. H. Cheyne, " The Earth's Motion of Rotation, 



including the Theory of Precession and Nutation". . . . 538 

 Mr. R. A. Proctor's Sun-views of the Earth, or the Sea- 

 sons Illustrated 539 



Proceedings of the Royal Society : — 



Dr. A. W. Hofmann on the History of Methylic Aldehyde. 540 

 Dr. J. D. Everett's results of Observations of Atmospheric 

 Electricity at Kew Observatory, and at Windsor, Nova 



Scotia 543 



Mr. J. H. N. Hennessey on a supposed Connexion between 

 the Amount of Rainfall and the Changes of the Moon. 544 

 Proceedings of the Geological Society : — 



Mr. H. A. Nicholson on the Graptolites of the Skiddaw 



Series 546 



Mr. P. M. Duncan on the Fossil Corals (Madreporaria) of 



the West-Indian Islands 546 



Sir J. Lubbock on the Parallel Roads of Glen Roy 547 



Mr. C. Collingwood on the Geological Features of the 

 Northern part of Formosa and the adjacent Islands ; and 

 on some Sources of Coal in the Eastern Hemisphere . . 548 



Electroscopic Notices, by Professor Poggendorff 549 



On the relative Magnitude of Molecules, by Dr. Alexander 



Naumann 551 



On the Polarization of the Electrodes, by M. J. M. Gaugain. . 553 



Index 555 



PLATES. 



I. Illustrative of Professor R. Bunsen's Paper on a Method of determi- 

 ning the Specific Gravity of Vapours and Gases. 



II. Illustrative of Mr. H. Wilde's Experimental Researches in Magnetism 

 and Electricity. 



III. Illustrative of Dr. Watts' s Paper on the Spectrum of the Bessemer- 



flame, and Dr. C. Collingwood's on a Horizontal Rainbow ob- 

 served at Sea. 



IV. Illustrative of Professor R. Bunsen's Paper on the Temperature of 



the Flames of Carbonic Oxide and Hydrogen. 



