DEPARTMENT OF MTNERALOGY. 157 



On Striiverite and its relations to Ilmenorutile : by G. T. 

 Prior, M.A., D.sc, f.g.S., and Dr. F. Zambonini. 



On Hopeite and other Zinc phosphates and associated 

 minerals from the Broken Hill mines, North-Western Rhodesia : 

 by L. J. Spencer, m.a., f.g.s. 



On Chlormanganokalite, a new Vesuvian mineral ; with 

 notes on some of the associated minerals : by Dr. H. J, 

 Johnston-Lavis and L. J. Spencer, m.a., f.g.s. 



Note on synthetical corundum and spinel : by G. F. Herbert 

 Smith, M.A., D.sc, F.G.S. 



Demonstrations. 

 Demonstrations on the Collections have been given to the 

 Polytechnic Natural History Society, the Jewellery Class of the 

 Northampton Institute, Clerkenwell, and the Battersea Field 

 Club. 



3IisceUane6us. 

 During the year 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 

 (including the large series of iron-pyrites) as far as linnaeite, 

 and for the whole of the Haloid Division (including the large 

 series of fluor) ; a commencement has been made with the 

 Oxide Division, and slips have been prepared for the species 

 from cuprite to manganobrucite. The specimens of some of 

 these species exhibited in the case-tops have been re-arranged 

 on trays that have been re-polished and lined with fresh wool. 

 In the course of this work a modified form of standard for the 

 species-labels which does not interfere with the alignment 

 of the trays was introduced ; at the same time old specimens 

 hitherto bearing numbers referring only to special catalogues 

 have been entered in the general register, and permanent labels 

 giving all available information have been written for each 

 specimen. 



Experiments have been made with a view to the improve- 

 ment of the exhibition of the faceted gem-stones. 



Those specimens of the collection of the late Miss Caroline 

 Birley which were not required for the British Museum or the 

 Manchester Museum have been sorted into seven lots and sent, 

 on behalf of the Executors, to public museums in the neighbour- 

 hood of Manchester, Miss Birley's former home. 



New locality-labels, species-labels and other labels have been 

 printed, and have been distributed in the exhibition cases, and 

 the necessary additions have been made in the alphabetical and 

 topographical indices of localities. In connection with this 

 work, samples of card for the labels were critically examined. 



Seventy-five boxes of mineral-specimens have been received,, 

 unpacked and examined ; one hundred and two boxes have 

 been packed and despatched. 



One hundred and fifty thin slices of rocks have been pre- 

 pared, and two large meteorites have been cut. 



