PREFACE. 



IN preparing this version in English of Fourier s 

 celebrated treatise on Heat, the translator has followed 

 faithfully the French original. He has, however, ap 

 pended brief foot-notes, in which will be found references 

 to other writings of Fourier and modern authors on 

 the subject : these are distinguished by the initials A. F. 

 The notes marked R. L. E. are taken from pencil me 

 moranda on the margin of a copy of the work that 

 formerly belonged to the late Robert Leslie Ellis, 

 Fellow of Trinity College, and is now in the possession 

 of St John s College. It was the translator s hope to 

 have been able to prefix to this treatise a Memoir 

 of Fourier s life with some account of his writings ; 

 unforeseen circumstances have however prevented its 

 completion in time to appear with the present work. 



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