110 Scientific Proceedings, Royal Dublin Society. 



tion was afterwards amply confirmed by the discovery in that rock- 

 group of Carboniferous fossils. Mr. Hamilton has set an exo.mple 

 which I could wish to see more often followed by geologists in 

 displaying concern for the antiquarian remains of Ireland. During 

 the investigation of the cairns on the Lough Crew hills, in 1S65, 

 Mr. Hamilton rendered great assistance, not only by the supply 

 of workmen, but also by personal inspection, and in consequence 

 the marked thanks of the Royal Irish Academy were returned to 

 him for his valuable services on the occasion. 



It is with the deepest feeling of regret that we have to record 

 an event which, however, must have taken place before long in 

 the ordinary course of nature, and that is the death, on January 

 17, 1881, at the ripe age of 82 years, of the venerated Humphrey 

 Lloyd, D.D., D.c.L. (Oxon.), ll.d. (Cantab.), f.r.s., Provost of 

 Trinity College, Dublin. This is a feeling in which all present 

 will share, not only as those who can prize high moral worth and 

 intellectual capacity, but also as Irishmen who can be proud of a 

 distinguished fellow-countryman, and also as members respectively 

 of the two associated Societies of which this is a joint meeting. 

 Dr. Lloyd had been President of the Royal Geological Society of 

 Ireland in 1863 and 1864, and at his death was still Vice-President 

 thereof and of the Royal Dublin Society. He was an original 

 member of the Geological Society, which was established in 1831 ; 

 his father, Dr. Bartholomew Lloyd, was our first President and as 

 such gave the opening address to the Society in February, 1832. 

 Our late distinguished Ex-President did not make geology a special 

 subject of his attention, although taking a great interest therein ; 

 nevertheless the three lines of physical research which he more 

 particularly prosecuted bear more or less strongly on our science. 



The first we shall mention is that of Optics. He has left two 

 important works on that subject, viz., A Treatise on Light and 

 Vision, 1831, and lectures on the Wave Theory of Light, besides 

 various papers in the Transactions of the Royal Irish Academy 

 and elsewhere. He it was who was selected to draw up the 

 " Report on the Progress and Present state of Physical Optics " for 

 the British Association in 1834, Physical Optics bears directly 

 on the subject of Crystallography, which belongs to Mineralogy, 

 which, in its turn, is really part of the comprehensive science of 

 Geology ; and therefore we find most appropriately inserted in 



