CONTENTS OF VOL. II 



(FOURTH SERIES.) 



NUMBER VIII.— JULY 1851. 



Page 



M. R. Clausius on the Moving Force of Heat, and the Laws re- 

 garding the Nature of Heat itself which are deducible there- 

 from 1 



Mr. H. J. Brooke on the Beudantite of Levy 21 



M. C. F. Schoenbein on the joint Influence exerted by Light 

 and the Oxidability of certain substances upon common 

 Oxygen 22 



Dr. Tyndall's Reports on the Progress of the Physical Sciences : 



1. Prof. Dove on the Reversion-prism, and its application 



as ocular to the Terrestrial or Day-Telescope 26 



2. Prof. Dove's Description of several Prism-stereoscopes, 



and of a simple Mirror-stereoscope 27 



3. Prof. Knoblauch on the Deportment of Crystalline 



Bodies between the Electric Poles 33 



Mr. W. J. M. Rankine on the Theory of Sound 36 



Mr. T. G. Bunt's Pendulum Experiments 37 



Mr. P. J. Martin on the Anticlinal Line of the London and 



Hampshire Basins 41 



Mr. G. P. Bond's Historical Sketch of the progress of improve- 

 ment in the application of Electro-Magnetism to Geodetical 



and Astronomical purposes 51 



Prof. Donkin on certain Questions relating to the Theory of 



Probabilities. — Part III. 55 



Prof. Stokes on the Principles of Hydrodynamics 60 



Mr. W. J. M. Rankine on the Mechanical Theory of Heat. . . 61 

 Mr. T. S. Hunt's Description and Analysis of Loganite, a new 



Mineral Species 65 



Notices respecting New Books : — Prof. Airy's Six Lectures on 

 Astronomy delivered at the Meetings of the Friends of the 



Ipswich Museum 68 



Proceedings of the Royal Society 71 



Postscript to Mr. T. G. Bunt's Pendulum Experiments 81 



On the Total Eclipse of the approaching 28th of July, by M. 



Faye 81 



Meteorological Observations for May 1 85 1 83 



Meteorological Observations made by Mr. Thompson at the 

 Garden of the Horticultural Society at Chiswick, near 

 London ; by Mr. Veall at Boston ; by the Rev, W. Dunbar at 

 Applegarth Manse, Dumfries -shire ; and by the Rev. C. 

 Clouston at Sand wick Manse, Orkney 84 



