222 ACCOUNTS, ETC., OF THE BRITISH MUSEUM. 



slips for hsematite, ilmenite, pseudobrookite, and s^oethite have 

 been checked, and the specimens re-arranged ; labels have been 

 written for the specimens of corundum (in the drawers), 

 haematite, ilmenite, and pseudobrookite, and have been placed 

 with the specimens ; 250 specimens of the species aragonite to 

 cerussite belonging to old collections have been entered in the 

 General Register ; and permanent labels have been written and 

 placed with all the specimens of the species aragonite to 

 strontianite. 



Slip lists have been made of all specimens not entered in the 

 General Register amongst the doubtful species of minerals in 

 the drawers (Case G), and in the Introductory and Species 

 Collections of Rocks, and their history has been traced as far 

 as possible. Of these specimens one hundred and fifty-five 

 minerals and eighty-eight rocks respectively have been regis- 

 tered and labelled. 



A list of specimens in the Collection of which figures have 

 been published, more especially in the older literature, has been 

 •commenced. 



Labels have been affixed inside the doors of the various old 

 cabinets in the Department, stating the history of each. 



The preparation of labels for printing has been commenced, 

 locality labels already in stock have been placed in the cases 

 to replace written ones, and the corresponding entries have been 

 made in the alphabetical and topograpical indexes of localities. 



The slip-catalogues of the topographical collections of rocks 

 and of the rock-sections have been kept up to date. 



Slips have been written for the rocks in the species 

 collection, to form the basis of a list of rock-names. 



An index to the foreign rock collections giving the position 

 of the various collections in the gallery, has been prepared. 



Three hundred and eight thin-sections of rocks have been 

 microscopically examined and labelled. 



The preparation of a cop}'' of the register of the specimens 

 in the Collection has been completed to Vol. XVIII., and the 

 current volume has been copied and brought up to date. 



The collection of meteorite sections has been numbered and 

 arranged. 



III. — Preparation. 



Two hundred and twenty-four thin-slices of rocks and 

 meteorites have been prepared. 



I V. — Investigation. 



Twinned crystals of felspar from Portugal and of bertrandite 

 from Cornwall have been measured and described. Crystals 

 of crocoite from Tasmania, brookite from Switzerland, calcite, 

 anglesite, chabazite, copper pyrites, sapphire, datolite, anatase, 



