DEPARTMENT OF MINERALOGY. ISO" 



The following paper, relating to specimens in the collection, 

 has been published in the " Mineralogical Magazine and Journali 

 o2 the Mineralogical Society " : — 



" On the identity of Guarinite and Hiortdahlite " : by Dr. F. 

 Zambonini and Dr. G. T. Prior. 



Demonstrations. 



Demonstrations on the Collections have been given ta 

 the Geologists' Association, the Selborne Society, and the 

 Polytechnic Natural History Society. 



Miscellaneous. 



The preparation of the slip-catalogues of the mineral 

 specimens in the Collection has been continued. This work 

 has been completed for the Arsenides and Sulphides as far as- 

 emplectite, and for the Oxides as far as corundum. In this- 

 connexion the specimens, including the large series of spinel, 

 have been re-arranged ; old and faded register-numbers have 

 been re-written ; unsightly labels have been removed from the 

 front to the back of specimens ; permanent labels giving all 

 available information have been written, checked, and placed 

 with the specimens for many of the species from copper-pyrites 

 to tetrahedrite ; and, in the case of the species, iron-pyrites, 

 and marcasite, decomposing specimens have been cleaned and 

 put aside in drawers with quicklime. 



A series of liquids of varying refractivity has been prepared 

 to facilitate the determination of the refractive indices of 

 mineral fragments under the microscope. 



Twelve new cubes of GO drawers have been fitted in the 

 Gallery, and the species gersdorffite, glaucodote, haematite^ 

 gypsum, and barytes have been extended into them. 



Samples of card and paper for labels have been examined,, 

 and a new label for microscope-slides has been designed. 



Re-arrangements of specimens have been made in the 

 Rock-species Collection in accordance with the method of 

 classification adopted in the new edition of the rock-guide^ 

 and many new descriptive labels have been prepared. 



Ninety-two boxes of mineral specimens have been received,, 

 unpacked, and examined ; 98 boxes have been packed and 

 despatched. 



One hundred and ninety-nine thin slices of rocks have been 

 prepared. 



Departonental Library. 



To the Departmental Library have been added 73 volumes- 

 of separate works, 30 pamphlets, 30 parts of works, 103 mining 

 and survey reports, 2 maps, and 33 periodicals (in 408 volumes 

 and parts); of these, 20 volumes and G parts of separate works- 



