271 



brations, such as air, gases, &c., approximately ; and the other 

 limit being a body, such as the optical medium, capable of 

 propagating exclusively transverse vibrations. Bodies lying 

 between these limits are capable of propagating both normal 

 and transverse vibrations, or, more generally, three definite 

 directions of vibration, neither normal nor transverse. The 

 consideration of the properties of bodies with respect to the 

 propagation of plane waves supplies a valuable means of clas- 

 sifying them, and may lead to more important results. 



The remainder of Mr. Haughton's paper is occupied with 

 some particular applications of the general method, which are 

 not suited to the limits of an abstract. 



Sir William Betham read a paper on the proceedings of a 

 commission issued by Cromwell in 1653 or 1654, to inquire 

 into the circumstances and conduct of certain Scotch settlers 

 who were transplanted from Ulster to Kilkenny and Tipperary. 



Sir Charles Coote was Governor of Derry for the Parlia- 

 ment in 1648, and on the execution of the King, the Scottish 

 settlers in Ulster became indignant, raised several regiments, 

 and besieged Derry. 



In 1653 a commission was issued to Sir Charles Coote, 

 and five or six others, to inquire into the conduct of the Scottish 

 settlers, and arrange for their transplantation from Ulster to 

 Kilkenny and Tipperary. Sir W. Betham's paper is a copy 

 of the Commissioners' Report, with the terms of the trans- 

 planting, and the names of the persons transplanted. 



The collection of Ogham stones, referred to at p. 235, 

 was presented to the Academy by the Rev. Charles Graves, 

 on the part of Mr. Hitchcock, who communicated the follow- 

 ing account of their discovery in difi"erent localities in the 

 barony of Corkaguiny, County Kerry. 



No. 1 is from the churchyard of Aglish. Another very 

 imperfect one remains in this churchyard. 



