CONTENTS, V 



PAGE 



Society. — The British Association. — Joint Research with 

 Scoresby. — Heat Evolved during Electrolysis of Water. — 

 Summary of Results. —Approaches Generalization. — Com- 

 mences Third Research 45 



CHAPTER V. 



Third Research. — Heat Generated or Transferred 1 — 

 Arrangement not Generation of Heat in Voltaic Appa- 

 ratus. — The Heat Developed in the Entire Circuit by 

 Magneto- Electricity not the Result of Arrangement. — 

 Discovers Heat in the Revolving Armature. — Determines 

 Relation between Heat and Electric-Action ; the Same as 

 with Voltaic Current. — Generation and Destruction of 

 Heat by Mechanical Means by the Agency of Magneto- 

 Electricity. — Constant Ratio between the Heat and the 

 Power. — First Determination of the Mechanical Equivalent 

 of Heat. — The Climax of Joule's Researches. — Attends 

 British Association at Cork, 1843. — Dazzled by Possibility 

 of Practical Results. — Conclusions not altogether Justified. 

 — Postscript. — Mechanical Effect Converted into Heat by 

 Friction. — Law of Conservation Realized ... 59 



CHAPTER VI. 



Efforts to Convince the Scientific WoRLD.-Pre-eminence 

 in Knowledge of Physical Science. — General Silence; the 

 Highest Tribute to the Greatness of the Advance. — Friendly 

 Sympathy. — Oakfield. — Researches in his New Laboratory. 

 — Rarefaction and Condensation of Air. — Difficulties. — No 

 Latent Heat. — Convertibility of Free Heat into "Work." — 

 Dynamical Theory of Heat. — Development of Davy's 

 Dynamical Theory of Gases. — New Theory of the Steam 

 Engine. — Criticism of Carnot's Theory. — Heat Discharged 

 into the Condenser. — Discussion of Results. — Joule ignores 

 the Truth of Carnot's Theory. — Indestructibility of Caloric 

 Proved. — Definite Dynamical Theory of Gases. — Imperfect 



