VI CONTENTS. 



PAGE 



acquaintance with Mechanical Philosophy. — Absolute Zero 

 of Temperature. — First Determination with the Paddle. — 

 Realization of Dynamical Significance of "Work." — Extent 

 of Experimental Work. — Research with Scoresby ; Visits to 

 Bradford. — Essay to the Institute of France. — Research on 

 Effect of Magnetism on the Dimensions of Iron and Steel. — 

 Joint Research with Sir Lyon Playfair ; Atomic Volumes... 74 



CHAPTER VII. 



The Year 1847. — Lecture at St. Ann's Church Reading 

 Room. — Conservation of "Force." — Fresh Determination 

 of Equivalent. — Verification of Laplace's Theory of Sound. 

 — Joule's Paper accepted by the Institute of France. — 

 Meeting of British Association at Oxford. — First Public 

 Recognition of Joule's Discoveries. — Joule's Account. — Sir 

 William Thomson's Account. — Marriage. — Shooting Stars, 

 — The Adoption of Herapath's Hypothesis. — Determina- 

 tion of Velocities of Molecules of Gases and Theoretical 

 Specific Heats 103 



CHAPTER VIII. 



Joule's Views accepted by Thomson, Rankine, and 

 Clausius. — Effect of Publication of Regnault's Researches. 

 — Thomson's First Paper on Mechanical Effect by Thermal 

 Agency. — Maintains Inconvertibility of Heat. — Note on 

 Joule's Views. — Conversion of Heat into Work Denied.— = 

 Work into Heat Accepted. — Second Paper. — Greater 

 Deference. — Accepts Joule's Difficulties as to Carnot's 

 Axiom. — Thomson's Courage in Expressing his Doubts. — 

 Discovery of Dissipation of Energy. — Rankine's Hypothetical 

 Theory of Heat. — Acknowledges Joule's Hypothesis. — 

 Hypothetical Foundation obscures General Laws. — Accepts 

 Joule's Views. — Criticises Joule's Experiments. — Apology 

 and Acceptance of Joule's Equivalent. — Joule suggests 

 the form of Carnot's function. — Clausius Theory — Based on 

 Joule's and Carnot's discoveries — Contains Hypotheses. — 



