2 Annual Report. 



for the next evening was read by Mr. John H. Greenhill, on 

 the 3rd March, the subject was "Electric Lighting and Trans- 

 mission of Power by Electricity." The attendance on this 

 occasion was so large that many persons were unable to gain 

 admittance to the lecture-room ; Mr. Greenhill, therefore, kindly 

 consented to repeat the lecture. This was done on Thursday, 

 the 5th of March, before a very numerous audience. The next 

 evening of meeting was March 24th. This was extra to the 

 programme arranged at the commencement of the Session. The 

 readers were Mr. John Brown, who made a communication on 

 "A Stalactite formed by a Vapour ;" and Mr. Wm. Workman, 

 who read a paper on " The Ventilation and Heating of Churches 

 and Drying-rooms." The last paper of the session was read 

 by the Rev. Robert Workman, on " Land Tenure and Culture 

 in Ancient Ireland," on April 14th. 



The work of re-arranging the Museum collections has, during 

 the past year, been confined to the extensive series of mineral 

 specimens. This valuable collection has been classified accord- 

 ing to the system adopted in " Dana's Manual of Mineralogy," 

 and, with a few exceptions, each specimen has been furnished 

 with a label stating name and locality. Some of the minerals 

 recently received from the British Museum have been inserted 

 into their proper places, and it is intended that the remainder 

 shall in like manner be incorporated with the general collection. 

 This will have the undesirable effect of still further increasing 

 the present overcrowding ; but in the absence of additional 

 cases there is no more satisfactory method of displaying these 

 specimens, which include several noteworthy additions to the 

 existing stock. 



A list of donations to the Museum, and of reports and other 

 publications for the Society's library, is to be printed with the 

 present Report. The Council would thank the various donors 

 for their valuable gifts, and would call particular notice to the 

 series of Eastern weapons and works of ornament, presented by 

 Captain Robert Campbell, of the u Slieve Donard." The mem- 

 bers will recollect that in the previous years Captain Campbell 

 was also a donor of a number of interesting objects, collected by 



