172 PORTRAITS. 



Roscoe. Mr. A. Joule also has in his possession a bust of 

 his father. With the exception of the portrait by Patten, 

 all these represent Joule in later life, and after he had grown 

 a beard. Patten's portrait, which represents him at the age 

 of 45 and in full vigour, has so far been little known, except 

 within the Society, and it is chiefly for this reason that 

 the Council have taken the opportunity afforded of pub- 

 lishing the engraving as a frontispiece to this Memoir. 



