RELATING TO THE BREAKING OF RAILWAY BRIDGES. 735 



The fact of the integrabih'ty of equation (4) in the form given in art. 7, to which I had myself been 

 led from the circumstance above mentioned, has since been communicated to me by Mr. Cooper, 

 Fellow of St John's College, through Mr. Adams, and by Professors Malmsten and A. F. Svanbcrg of 

 Upsala through Professor Thomson ; and I take this opportunity of thanking these mathematicians 

 for the communication. 



G. G. STOKES. 



Pembroke College, 

 Oct. 22, 1849. 



