DEPARTMENT OF MINERALOGY. 141 



merit and cataloguing of the Departmental Library ; the third 

 with the more mechanical work of the chemical laboratory. 



The general duties of dusting the cases, packing and unpack- 

 ing of specimens, copying, &c., are also performed by the atten- 

 dants. 



Tivo Boy-Attendants. — They attend on the superior officers 

 as required, are charged with the sale of the departmental 

 guides, and do a large part of the simpler mechanical work, 

 such as the filling of trays with clean cotton wool, &;c. 



General. 



For the continuation of the descriptive catalogue of 

 the Mineral Collection, the following species have been 

 examined ; Calaverite, Krennerite, Gersdorffite, Ullmannite 

 Corynite, Griinauite, Geocronite and Frieseite : and the part, 

 which deals with the species Acanthite and Stephanite has 

 been brought up to date. 



Specimens of Melanophlogite, Sillimanite, Olivenite, Jade 

 and Jadeite, have been crystallographically and optically ex- 

 amined. 



A new mineral species has been determined, and described 

 under the name of Sanguinite. 



Descriptions have been published of Stephanite and Kren- 

 nerite ; also analyses of Polybasite, Stephanite, and incrusta- 

 tions of zinc sulphide. 



One hundred and fifty-one specimens have been chemically 

 examined, including a large series of nickel ores, and 74 doubt- 

 ful minerals ; quantitative analyses of Ullmannite and 

 Bowenite have been made. 



The meteoric irons of Mexico have been examined, and 

 descriptions have been published. 



The arrangement of a crystal collection has been com- 

 menced with the selecting, mounting, and labelling of typical 

 crystals. 



The specimens illustrative of metallic ores have been placed 

 together in one part of the gallery. 



The large series of Fluors has been topographically ar- 

 ranged, and the duplicates have been set aside. 



The preparation of a complete list of species and varieties 

 of minerals not yet represented in the collection has 

 been begun. 



New editions of the Student's Index to the Collection of 

 Minerals and of the Meteorite Guide have been published. 



Exchanges of specimens have been arranged with the 

 Museums of Munich, Utrecht, and Eio de Janeiro, the United 

 States National Museum, and Mr. E. A. Pankhurst. 



The rocks from Fernando Noronha have been examined, 

 and the large collection of rocks made by the Challenger 

 Expedition has been incorporated. 



The limestones have been sorted, and duplicate specimens 

 have been laid aside. 



0,81. The 



