39936-33 

 125 vol 



CONTENTS OF VOL. XXXII 



(FOURTH SERIES.) 



NUMBER CCX1II.— JULY 1866. 



Page 



Prof. R. Clausius on the Determination of the Energy and En- 

 tropy of a Body 1 



Archdeacon Pratt's Reply to Captain A. R. Clarke's Remarks 

 on his Determination of the Figure of the Earth from Geo- 

 detic Data 17 



Prof. Helmholtz on the Regelation of Ice 22 



The Rev. S. Haughton on Hanging, considered from a Me- 

 chanical and Physiological point of view 23 



Mr. D. D. Heath on the Problem of Sea-levels 34 



Prof. R. Clausius on the Reflection of Light in the Atmosphere. 41 



Prof. Challis on an Extension of the Principles of the Calculus of 

 Variations 45 



Mr. J. B. Lawes and Dr. J. H. Gilbert on Food in its relations to 

 various exigencies of the Animal Body 55 



Lieut. -Colonel Strache on the Action of Aqueous Vapour on 

 Terrestrial Radiation ....... 64 



Proceedings of the Royal Institution : — 



Prof. Tyndall on the Vibrations of Strings 68 



Proceedings of the Royal Society : — 



Mr. C. W. Siemens on Uniform Rotation 7 6 



Observations on Skylight Polarization at Philadelphia, by Mr. 

 Chase - 79 



On Motion in a Resisting Medium, by Dr. O. Schreckof Bremen. 80 



NUMBER CCXIV.— AUGUST. 



Prof. R. Bunsen on Flame Reactions. (With a Plate.) 81 



Mr. J. Croll on the Influence of the Tidal Wave on the Motion 



of the Moon 107 



Prof. Magnus on the Influence of the Absorption of Heat on the 



Formation of Dew Ill 



Prof. Tyndall's Remarks on the Paper of Professor Magnus . . 118 

 Prof. Young on the Evaluation of Vanishing Fractions, with 



some Supplementary remarks on Newton's Rule 121 



M. H. Caro on the formation of Rosolic Acid and Rosaniline. . 126 



