Reports and Proceedings — Palmontographlcal Society. 331 



of pyroxene ; biotite uncommon ; chlorite ; quartz ; epidote ; and 

 calcite. In the least altered rocks the minerals are comparatively 

 unchanged ; then there is, first of all, molecular rearrangement 

 under pressure without movement ; next, mylonitization and. 

 recrystallization ; and lastly, the whole rock becomes cataclastic, 

 with partial or complete obliteration of its original structure. The 

 gradual appearance of these features towards the east is proof that 

 the deforming agency operated from that direction. 



MiNERALOGiCAL SociETY, June 7th, 1904.— Dr. Hugo Muller, 

 President, in the Chair. The Eev. Mark Fletcher contributed 

 a note on mispickel from Sulitjelma mine, Norway, containing about 

 1-32 per cent, of cobalt, and showing the forms [Oil], [012], [110]. 

 — Mr. G. F. Herbert Smith exhibited a hand-refractometer of the 

 Bertrand type in which the curvature of the focal surface has been 

 reduced by means of a correcting lens, with a consequent improve- 

 ment in the definition of the shadow edges. — Professor H. A. Miers 

 gave an account, illustrated by numerous lantern slides, of the 

 development of the Kimberley Diamond Mines. He traced the 

 changes in the methods of working from the first surface diggings 

 to the time when the blue-ground was brought to the edge of the 

 pit by a ' cobweb ' of wire ropes stretching from the numerous 

 independent claims into which the mines were split up, and showed 

 how the increasing difficulties involved in this method led to the 

 final consolidation of the mines under Beit & Rhodes, and the 

 initiation of the present system of mining, which consists in sinking 

 shafts on the edge of the pit and running cross-cuts into the blue- 

 ground. He referred finally to the recent discovery of blue-ground 

 in the neighbourhood of Pretoria. 



Pal^ontoguaphical Society. 

 The annual general meeting of the Palfeontographical Society 

 was held at the Geological Society's apartments, Burlington House, 

 on Friday, 17th June, Dr. Henry Woodward, F.R.S., President, 

 in the Chair. The fifty-seventh annual report of the Council and 

 the balance sheet were submitted for the approval of the members. 

 The report began by alluding to the activity at present prevailing 

 in the study of British fossils, and stated that the Paleeontographical 

 Society's Council continued to receive more offers of matter than 

 they were able to accept for immediate publication. The volume 

 for 1903 was unusually large, and was illustrated with no less 

 than 48 plates. It comprised the concluding parts of Dr. Foord's 

 Monograph of Irish Carboniferous Cephalopoda, and vol. i of 

 Mr. Woods' Monograph of Cretaceous Lamellibranchia. It also 

 contained instalments of the Monograph of Chalk Fishes, Car- 

 boniferous Lamellibranchiata, and British Graptolites, besides the 

 first part of a new Monograph by Mr. Cowper Reed on the Paleozoic 

 Trilobites of Girvan. The publication of this volume involved an 

 expenditure of over £200 beyond the income received during the year. 

 The report, indeed, showed a gradual decrease in the income of the 

 Society during recent years, and referred to the necessity of filling 



