DEPARTMENT OF MINERALOGY. 91 



IV. — Investigation. 



A crystal lographic investigation of sartorite has been in progress, 

 a considerable number of crystals of this rare mineral having been 

 made available for a detailed study through the kindness of Mr. 

 R. H. Solly and Dr. C. 0. Trechmann. In the course of this 

 work several crystals of other sulpharsenites of lead (baumhauerite, 

 jordanite, and rathite) from the Binnenthal were measured and the 

 indices of the faces were determined. 



A twin-crystal of gypsum representing a new type has been 

 examined, figured, and described. 



Investigations have been made of the meteoric stones of Khairpur, 

 Soko-Banja, and Simondium. As a result of these and previous 

 investigations a genetic relationship of all meteorites has been 

 suggested, and on this a new classification has been based. 



Y. — Departmental Library. 



Cataloguing and Press-marking. — All the accessions, including 

 713 plates, have been catalogued and stamped. 



The collection of treatises on mineralogy, numbering 490 volumes, 

 have been removed from the Keeper's Room and arranged in chrono- 

 logical order in the new case in the Library Room. 



Proofs of the Library Catalogue (Supplement) have been read and 

 checked against the slip catalogue in the Department. 



Accessions. — 27 volumes of separate works, 19 periodicals (in 

 211 volumes and parts), one print, 20 pamphlets, three parts of 

 works, <^4 Mining and Survey reports, and six sheets of maps have 

 been added to the Library. 



Binding. — 116 volumes have been bound. 



VI. — Acquisitions. 



^&& specimens have been acquired, namely : — 



464 minerals (including artificial crystallized products), 395 

 rocks, and 7 meteorites. 



Three meteorites have been acquired by exchange from the 

 South African Museum, Cape Town. 



The following mineral names added to the Museum List were 

 previously not represented by specimens in the collection : — 



Pyroxmangite, spencerite, yukonite. 



Only three specimens of minerals have been purchased. 



The specimens acquired by presentation (arranged alphabetically 

 according to donors) and by exchange are as follows : — 



Minei'als. 



By Presentation : 



Further instalments from the donor's collection of zeolites, 

 comprising 304 specimens from 47 localities in the British Isles, 

 Germany, Bohemia, Tyrol, Switzerland, Australia, Japan, U.S.A., 



