DEPARTMENT OF MINERALOGY. 145 



Numerous rock specimens belonging to the topographical 

 series have been examined, labelled and rearranged, including 

 the collections from Harz, Hungary, St. Gotthard, Auvergne, 

 Iceland, Arabia, Persia, Mexico, Elba, India, New Zealand, 

 Australia, Azores, and St. Helena. 



One hundred and seventeen microscopic sections of rocks 

 and minerals have been prepared, and eight slices of meteo- 

 rites have been cut for exchange. 



Selections have been made from two large private collec- 

 tions of minerals which were brought to the Museum for the 

 purpose. 



Exchanges have been arranged during the year with the 

 Musee d'Histoire Naturelle, Paris, and with Owens College, 

 Manchester. 



One of the assistantships has been practically vacant during 

 the whole year. 



Departmental Library. 



To the Departmental Library have been added 91 separate 

 works (in 100 volumes), 24 memoirs and pamphlets, 18 parts 

 of works not yet completed, and two maps. Of the above, 

 44 volumes and two maps were acquired by presentation 

 or transfer ; all of them, including 695 plates, have been 

 registered and stamped. 



Visitors. 



The number of visits recorded as made to the Department 

 for purposes of consultation or study is 1,714 ; of these 975 

 were more especially for purposes of study. 



Duplicates. 



A collection of 3,744 duplicate rock specimens has been 

 given to the Museum of Science and Art, Dublin ; labels 

 containing any information recorded in the Departmental 

 Register relative to them were prepared and sent with the 

 specimens. 



Acquisitions. 

 One thousand seven hundred and thirty-nine specimens 

 have been acquired during the year 1893, namely: — 1,023 

 minerals, 700 rocks and 16 meteorites. These have been regis- 

 tered, numbered, labelled and incorporated with the collection. 

 The more important of them are named below : — 



Minerals. 

 By Presentation : 



The most important acquisition of the year is a collection 



of five hundred and fifty specimens, mostly from Cornwall, 



0.107. including 



