100 ACCOUNTS, ETC., OE THE BRITISH MUSEUM. 



the Mineralogical Society," the " Geological Magazine," &c., 

 by members of the Staff of the Department : — 



1. On teallite, a new sulphostannite of lead from Bolivia, 



and its relations to franckeite and cylindrite : by 

 G. T. Prior, M.A., F.G.S. 



2. Note on pillow-lava apparently forming a continuous 



horizon from Mullion Island to Goran Haven in, 

 Cornwall : by G. T. Prior, M.A., F.G.S. 



3. Irregularly developed crystals of zircon (sp. gr. 4*0) 



from Ceylon : by L. J. Spencer, M.A., F.G.S. 



4. On the different modifications of zircon : by L. J.' 



Spencer, M.A., F.G.S. 

 0. An improved form of Three-Circle Goniometer : by 



G. F. Herbert Smith, M.A., F.G.S. 

 6. The construction and use of the Moriogram : by G. F. 



Herbert Smith, M.A., F.G.S, 



Miscellaneous. 



Proofs of the Historical Notes relative to the Minerals, 

 Hocks, and Meteorites, have been revised, and a biographical 

 index has been added. 



An improved method of labelling and numbering specimena 

 has been under consideration ; in this connection experiments 

 have been made in the painting of numbers on specimens. 



A slip-catalogue has been made of the large series of 

 specimens of native copper. 



New locality- and species-labels have been prepared, 

 printed, and placed in the exhibition-cases, and all the 

 necessary entries have been made in the alphabetical and 

 topographical indexes of localities. 



A series of experimental measurements has been made 

 with the new three-circle goniometer, and a diagram (" morio- 

 gram ") connecting the angles between, and the indices of, 

 tautozonal faces has been devised and drawn. 



An improved form of refractometer has been designed, and 

 experiments have been made with the instrument. 



The collection of Meteorites has been re-labelled; the 

 weight of each individual specimen in grams has been 

 determined and recorded in a special catalogue. 



Numerous specimens, sent or brought to the Museum by 

 visitors, have been examined and named. 



Assistance has been given in the revision of the proofs of 

 the Catalogue of the Museum Library. 



Sixty-eight boxes or parcels of mineral specimens have 

 been received, unpacked, and examined ; seventy-eight boxes 

 or parcels have been packed and despatched. 



