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XVI. — On the Attraction of Ellipsoids, with a new Demonstration o/ Clairaut's 

 Theorem, being an Account of the late Professor Mac Cullagh's Lectures on 

 those Subjects. Cojnpiled by George Johnston Allman, LL. D., of Trinity 

 College, Dublin. 



Read June 13, 1853. 



L i- HE following Memoir contains the substance of a Series of Lectures deli- 

 vered by the late Professor Mac Cullagh to the Candidates for Fellowship in 

 Trinity College, Dublin, in Hilary and Michaelmas Terms, 1846. 



It is now published by the Academy, with the view of securing to Professor 

 Mac Cullagh the merit of whatever is original in the investigation or its 

 results. 



The present Paper may be regarded as a Sequel to the Account of Professor 

 Mac Ccllagh's Lectures on Rotation, given by the Rev. Samuel Haughton 

 in a former part of the present volume of the Transactions of the Academy.] 



VOL. XXII. 3 D 



