102 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



been completed. In the course o£ this work many crystals of 

 various types of chabazite and also of calcite, analcite, and natrolite 

 associated with it have been measured on the goniometer. 



Complex crystals of sartorite and other sulph-arsenites from the 

 Binnenthal, aragonite, barytes, and garnet have been measured, and 

 crystals of iron phosphide from a blast-furnace have been studied 

 and described. 



Various doubtful minerals have been examined and determined, 

 including brochantite, bayldonite, tsumebite, from Otavi, S. W. 

 Africa ; albite, apophyllite, pectolite, prehnite, &c., from Pwllheli, 

 N. Wales ; pascoite from Peru ; roscherite and jezekite from 

 Saxony ; diopside from Burma ; topaz from Tasmania. 



The refractive indices of the precious stones in the Church 

 Collection have been determined, and, where possible, the double 

 refraction, dichroism, and absorption have been observed. 



Investigations have been made of the meteoric stones of Laun- 

 ton, Warbreccan, Cronstad, and Daniel's Kuil, and quantitative 

 analyses of each have been made in the chemical laboratory. 



V. — Departmental Library. 



Cataloguing and Press-marking. — 14 guard-books of letters 

 have been indexed. 



239 volumes and 80 title-slips have been press-marked or re- 

 press-marked. All the accessions, including 673 plates, have been 

 catalogued and stamped. 



Proofs of the Library Catalogue have been read and checked 

 against the slip-catalogue in the Department. 



Accessions. — 22 volumes of separate works, 24 periodicals (in 

 254 volumes and parts), 26 pamphlets, 11 parts of works, and 53 

 mining and survey reports have been added to the Library. 



Bindirig. — 94 volumes have been bound. 



VI. — Acquisitions. 



1,299 specimens have been acquired, namely : — 



357 minerals, 930 rocks, and 12 meteorites. 



The most important of these acquisitions is the remarkable 

 collection of 203 Precious Stones formed by the late Sir Arthur 

 Church (see pp. 101 and 103). 



Exchanges of specimens have been arranged with the Bloemfon- 

 tein Museum and with Mr. J. Morrow Campbell. 



The following mineral names added to the Museum List were 

 previously not represented by specimens in the collection : — 



Ferrimolybdite, jezekite, metahewettite, paratooite, pascoite, 

 skemmatite. 



The specimens acquired by presentation (arranged alphabetically 

 according to donors) and by exchange, and a selection of the more 

 important of those obtained by purchase, are as follows : — 



