﻿CONTENTS OF VOL. XLL 



(FOURTH SERIES.) 



NUMBER CCLXX.— JANUARY 1871. 



Page 



Prof. J. M. Silliman on the Examination of the Bessemer 

 Flame with Coloured Glasses and with the Spectroscope . . 1 



Dr. W. M. Watts on the Spectra of Carbon 12 



Mr. F. Guthrie on a few Experiments illustrative of Magnetism 



and Diamagnetism. (With a Plate.) 15 



Prof. E. Edlund on the Electromotive Force on the Contact of 



different Metals 18 



Dr. T. Andrews on the Heat Developed in the Combination of 



Acids and Bases.— Second Memoir 29 



Dr. L. Bleekrode on a curious Property of Gun-cotton 39 



Mr. W. H. Walenn on Solutions for depositing Copper and 



Brass by means of Electric Force 41 



Mr. A. S. Davis on the Probable Character of Cometary Orbits. 44 



Mr. R. A. Proctor's Note on the Zodiacal Light 53 



Dr. W. J. M. Rankine on the Hypothesis of Molecular Motions 



in Thermodynamics 62 



Proceedings of the Royal Society : — 



Dr. W. J. M. Rankine on the Mathematical Theory of 



Combined Streams 67 



Proceedings of the Geological Society : — 



Mr. T. Codrington on the Superficial Deposits of the 



South of Hampshire and the Isle of Wight 71 



The Rev. J. Gunn on the relative position of the Forest- 

 bed and the Chillesford Clay in Norfolk and Suffolk . . 73 

 Messrs. A. Hancock and R. Howse on a new Labyrintho- 

 dont Amphibian from the Magnesian Limestone of Mid- 

 deridge, Durham ; and on Proterosaurus Speneri and 

 Proterosaurus Huxleyi from the Marl-slate of Midderidge, 



Durham 74 



Dr. H. A. Nicholson on the Green Slates and Porphyries 



of the Lake District between Ulleswater and Keswick . . 74 

 Dr. F. von Muller and Mr. R. B. Smyth on some Vegetable 



Fossils from Victoria 75 



Mr. J. W. Hulke on some Plesiosaurian Remains obtained 



in Kimmeridge Bay, Dorset 75 



Mr. T. G. Bonney on the Geology of the Lofoten Islands. 76 

 Messrs. A. Hancock and R. Howse on Dorypterus Hof- 



manni from the Marl-slate of Midderidge, Durham .... 76 

 Staff Commander J. H. Kerr on Ice-marks in Newfoundland. 77 

 Mr. C. E. De Ranee on the Glacial Phenomena of Western 

 Lancashire and Cheshire 77 



