CONTENTS. Vll 



PAGE 



Thomson's Third Paper — General Foundation without 

 Hypotheses — Enthusiastic Acceptance of all Joule's Views. 

 — Joule's Final Determination of the Mechanical Equiva- 

 lent. — Historic Sketch. — Cordial Recognition of the Views 

 and Work of his Predecessors and Contemporaries 115 



CHAPTER IX. 



Middle Life. — Summer of his Life. — Acton Square. — 

 Welcomes Mathematical Assistance. — Comparative Rest. — 

 Amalgams. — Air Engine. — Joint Research with Thomson. 

 — Vice-President of the Society. — Visit of Sir William 

 Thomson. — Birth of his Daughter. — Royal Medal. — Death 

 of his Wife. — Return to Oakfield. — Honours. — Electrical 

 Welding. — Joint Research Resumed. — Memoir of Stur- 

 geon. — Thermo-dynamical Properties of Solids. — Council 

 of Royal Society. — Railway Accident. — Work at Oakfield. 

 — ThornclifTe. — His Experiments Stopped. — President of 

 the Society. — Honours. — Visits. — Small Scale Researches. 

 - — Determination of Mechanical Equivalent of Heat from 

 the Thermal Effects of Electricity. — Propagation of Joule's 

 Views. — Hirn's Verifications , ... 135 



CHAPTER X. 



Later Life. — Joule in 1869. — Estimation in the Society. — 

 Sociability. — Copley Medal. — Institute of France. — Nume- 

 rous Communications. — Display of Character. — Alleged 

 Effect of Frost. — Performance of Electro-Magnetic Engines. 

 — President of British Association. — First Failure of Health. 

 — Verification of Final Determination of Mechanical Equiva- 

 lent of Heat. — Change of Residence; 12, Wardle Road, 

 Sale. — Royal Pension. — Honours. — Collected Scientific 

 Papers by the Physical Society of London. — Declines to 

 be President of British Association, 1887. — Failing Health. 

 — Death. — Memorial Statue in Manchester. — Memorial 

 Tablet in Westminster Abbey. — International Memorial. — 

 Portraits of Joule 154 



