KELVIN 195 



wire with resistance equal to that of the electrolyte been 

 substituted for the electrolyte. The difference between 

 these two quanties of heat is equivalent to the heat which 

 is due to the reverse chemical combination by combustion 

 or other means." The problem was further investigated 

 by Lord Kelvin. He reasoned as follows : " Let unit 

 quantity of electricity pass through a cell of infinitely 

 small resistance ; then, by Joule's law, the work done 

 by the current is equal to E, the electromotive force. 

 But c gramme of one of the elements of the electrolyte 

 has been electrolyzed, in accordance with Faraday's law. 

 Let be the quantity of heat developed by the combina- 

 tion of one gramme of this element to reproduce the 

 electrolyte, then, since no work is expended in any other 

 part of the circuit 



E = Je0, and therefore == J. 



Je 



J = the mechanical equivalent of heat." 



Lord Kelvin died on 17th December 1907, the result 

 of a severe chill, and his remains were buried in the 

 nave of Westminster Abbey. It was an ever-memorable 

 occasion, when an enormous concourse of men of science 

 and others attended the funeral. Kelvin's grave is next 

 to that of Sir Isaac Newton, who was buried in 1727. 

 On the gravestone of the latter are the words : " Hie de- 

 positum est quod rnortale fuit Isaaci Newtoni." Newton's 



