26 PROFESSOR FORBES'S RESEARCHES ON HEAT. 



occasioned by the announcement of my Researches, in the same work, for the 

 6th January. The present paper, founded solely upon experiments undertaken 

 and completed before the dispatch of the earliest of M. MELLONI'S communica- 

 tions, will, I think, sufficiently answer all the questions which are started in his 

 letters to M. ARAGO, at least all those in which my experiments are concerned. 



12th May 1840. 



