IV CONTENTS OF VOL. XXXIV. FOURTH SERIES. 



Page 

 On the Spectrum of Mars, with some Remarks on the Colour of 



that Planet, by William Huggins, F.R.S 74 



On a New Method of determining the Resistance of Galvanic 



Circuits, by Prof. V. Waltenhofer 77 



Researches on the Variation in the dispersion of Liquids under 



the influence of Heat, by M. J.-B. Bailie 79 



NUMBER CCXXVIII.— AUGUST. 



Mr. H. Wilde's Experimental Researches in Magnetism and 

 Electricity. (With a Plate.) 81 



Dr. J. C. Draper on an Apparatus for the Detection of Adulte- 

 rations in Coffee 104 



The Rev. J. B. Harbord on the Conic Theory of Heat, in con- 

 nexion chiefly with the Metamorphosis of Matter 106 



Prof. C. Bohn on Negative Fluorescence and Phosphorescence. 108 



Mr. J. Croll on the Change in the Obliquity of the Ecliptic, 

 and its Influence on Climate 127 



Dr. A. C. Brown on Sir Benjamin Brodie's System of Chemical 

 Notation 129 



Mr. C. Tomlinson on the so-called " Inactive Condition of 

 Solids " 136 



Mr. J. P. Harrison on the Moon's Influence over Cloud 143 



Proceedings of the Royal Society : — 



Mr. H. C. Sorby on a Definite Method of Qualitative 

 Analysis of Animal and Vegetable Colouring-matters by 

 means of the Spectrum-Microscope 144 



Some Observations on Glass Tears, by E. Reusch 166 



Experiments on the Magnetism and Diamagnetism of Gases, by 

 M. J. Chautard , 168 



NUMBER CCXXIX.— SEPTEMBER. 



M. L. Schwendler on testing Telegraph-Cables during the pro- 

 cess of Sheathing 169 



Prof. J. D. Dana on a Connexion between Crystalline Form 



and Chemical Constitution, with some inferences therefrom.. 178 

 The Rev. J. B. Harbord on the Conic Theory of Heat con- 

 sidered in connexion with General Sensation and the three 



senses of Touch, Taste, and Smell < 185 



Mr. G. J. Stoney on the Connexion between Comets and Meteors. 188 

 M. G. Van der Mensbrugghe on the Tension of Liquid Films. . 192 



Sir David Brewster on the Radiant Spectrum 202 



Dr. A. Naumann on the Specific Heat of Gases for Equal Vol- 

 umes under Constant Pressure 205 



Mr. W. Ellis on the Influence of the Full Moon on Cloud 218 



Dr. Atkinson's Chemical Notices from Foreign Journals .... 220 



