IV CONTENTS OF VOL. XLIV. FOURTH SERIE 



Page 

 Prof. R. Clausius's necessary Correction of one of Mr. Tait's 



Remarks 117 



Mr. R. W. Atkinson on the Atomic Theory, in Reply to Dr. 



Wright 118 



Mr. A. Tribe's Remarks on the alleged ambiguity, insufficiency, 



and unnecessariness of the Atomic Theory 121 



Prof. N. S. Shaler on Earthlight on the Moon 123 



Mr. W. R. Birt's Contribution to oar knowledge of Atmospheric 



Waves 125 



Notices respecting New Books : — 



Mr. G. J. Symons's British Rainfall, 1871 138 



Proceedings of the Royal Society : — 



Dr. J. H. Gladstone and Mr. A. Tribe on the Action of 



Oxygen on Copper Nitrate in a state of Tension .... 139 

 The Astronomer Royal on a supposed Periodicity in the ele- 

 ments of Terrestrial Magnetism, with a period of 2 6^ days. 141 

 Proceedings of the Geological Society : — 



M. D. M. d'Orueta on the Geology of the neighbourhood 



of Malaga 146 



Prof. A. C. Ramsay on the River-courses of England and 



Wales 146 



Sir P. de M. Grey Egerton on Prognathodus Gilntheri, a 

 new Genus of Fossil Fish from the Lias of Lyme Regis, 

 and on two specimens of Ischyodus, from the Lias of 



Lyme Regis 147 



Prof. J. Nicol on how the Parallel Roads of Glen Roy 



were formed 148 



M. C. J. A. Meyer on the Wealden as a Fluvio-lacustrine 



Formation 1 48 



Researches on the Electric Jet in Rarefied Gases, and in particular 

 on its Mechanical Force, by MM. A. de la Rive and E. Sar- 



rasin 149 



On the Electrical Condition of Gas-flames, by John Trowbridge, 



Assistant Professor of Physics 153 



On the Primary Spectrum of Iodine, by M. G. Salet 156 



On a simple Apparatus for the production of Ozone with Elec- 

 tricity of High Tension, by Professor Arthur W. Wright . . 156 

 On a singular appearance of Magnesium in the Chromosphere of 

 the Sun, by M. Tacchini, in a letter addressed to M. Faye. . 159 



NUMBER CCXCIL— SEPTEMBER. 



Mr. L. Schwendler on Differential Galvanometers 161 



Mr. F. C. Webb on an Electrical Experiment with an Insulated 



Room 170 



M. E. Edlund on the Nature of Electricity 174 



Prof. Challis on the Hydrodynamical Theory of Attractive and 



Repulsive Forces . . 189 



