Minerals. 37 7 



Crystallised specimens of blodite from the Mayo salt mines, 

 Punjab, India : presented by Dr. H. Warth. 



A remarkable specimen of quartz (" cotterite ") with a peculiar 

 pearly lustre, from Rock Forest, County Cork : presented by 

 Miss G. E. Cotter. 



Large, white, hexagonal prisms of aragonite, on the matrix ; 

 from Herrengrund, Hungary : by exchange. 



An enormous, scalenohedral crystal of calcite (Iceland spar), 

 partly coated with bunches of stilbite ; the crystal, which is 

 upwards of two feet (60 centimeters) in length, has been cleaved 

 and mounted to show the wide separation of the two images 

 resulting from the double refraction of the mineral ; from 

 Rodefjord, Iceland : purchased. 



Large, parallel group of orthoclase crystals, virtually forming 

 a single one, with smoky quartz, on graphic granite; from 

 Alabaschka, Mursinsk, Urals : purchased. 



About fifty specimens of Swedish minerals, including large 

 crystals of pyrosmalite on the matrix : purchased. 



1877. 



Total acquisitions 905, including : 



A magnificent group of large, transparent, scalenohedral 

 crystals of proustite, which, having been protected from the 

 light, have retained both their colour and their transparency ; 

 from Chanarcillo, Chili : presented by Mr. H. Ludlam. 



Thirty specimens, mostly from Brazil ; including quartz, 

 pyrrhotite and chalybite, from San Juan del Rey mine, Minas 

 Geraes : presented by the Hon. R. Marsham-Townshend. 



About sixty specimens of Spanish minerals : by exchange. 



About forty specimens of Vesuvian and Sicilian minerals : 

 purchased. 



About one hundred specimens of Swedish minerals : 

 purchased. 



Fluor, an extremely large mass of "Blue John"; from 

 Derbyshire : purchased. 



Very brilliant, transparent crystals of pale-greenish apatite, 

 from Knappenwand, Untersulzbachthal, Salzburg ; purchased. 



Beryl ("aquamarine"), a long hexagonal prism with basal 

 plane, transparent, but much flawed, and a group of topaz crystals, 

 stained yellowish, with smoky quartz ; from Adun-Tschilon, 

 Nertschinsk, Transbaikal : purchased. 



