IV CONTENTS OF VOL. XXXI. — FOURTH SERIES. 



Page 

 Mr; J. M.Wilson's Remarks on an observation of Mr. Glaisher's 104 

 M. E. Wartmann on the Explosive Distance of the direct in« 



duced Current between Electrodes of the same kind 107 



Mr. J. P. Cooke on the Construction of a Spectroscope with a 

 number of Prisms, by which the angle of minimum deviation 

 for any ray may be accurately measured and its position in 



the solar spectrum determined . 110 



Mr. J. Gill on Regelation 119 



Dr. H. W. S. van der Kolk's Studies on Gases 1 24 



Dr. Atkinson's Chemical Notices from Foreign Journals .... 137 

 Notices respecting New Books : — Archdeacon Pratt's Treatise 

 on Attractions, Laplace's Functions, and the Figure of the 



Earth 144 



Proceedings of the Royal Society : — 



Dr.A.Matthiessenon the Expansion of Water and Mercury 149 

 Prof. W. H. Miller on the Forms of some Compounds of 



Thallium 153 



Proceedings of the Geological Society : — 



Mr. P. M. Duncan on the impressions of Selenite in the 



Woolwich Beds and London Clay 155 



The Rev. O. Fisher on the Relation of the Chillesford Beds 



to the Norwich Crag 156 



Mr. E. B. Tawnev on the Western Limit of the Rhaetic Beds 



in South Wale's 157 



The Rev. P. B. Brodie on a Section of Lower Lias and 



Rhsetic Beds near Wells, Somerset 157 



Dr. J. W. Dawson on the Conditions of the Deposition 



of Coal 158 



Prof. W. King and Dr. T. H. Rowney on the Origin and 

 Microscopic Structure of the so-called Eozoon-Serpen- 



tine „ 159 



Dr. W. B. Carpenter on the Structure and Affinities of 



Eozoon Canadense 159 



On the Measurement of Small Forces by means of the Pendulum, 



by MM. Jamin and Briot 160 



On the Expansion of Saturated Vapours, by M. A. Cazin 163 



NUMBER CCVIII.— MARCH. 



Prof. How's Contributions to the Mineralogy of Nova Scotia. . 165 



Mr. J. M. Wilson on some Problems in Chances 1 70 



Archdeacon Pratt on the Level of the Sea during the Glacial 



Epoch in the Northern Hemisphere 172 



Dr. E. J. Chapman on some Minerals from Lake Superior .... 176 



Dr. H. W. S. van der Kolk's Studies on Gases 181 



Prof. Tyndall on the Black-bulb Thermometer 191 



Captain A. R. Clarke on Archdeacon Pratt's ' Figure of the 



Earth ' 193 



