Reports and Proceedings — Mineralogical Society. 381 



basalt. While the major portion consists of basalt, the marginal 

 portion is cbiefly doleritic. Dolerite and basalt are, however, 

 intimately intermingled, patches of basalt occurring in the pre- 

 dominantly doleritic portion and vice versa. The relations are clearly 

 such as to point to the invasion of an earlier doleritic intrusion 

 by a later one of basalt. Two types of dolerite further occur, 

 a teschenite with fresh analcime and abundant augite and serpentinized 

 olivine being the prevalent type. This closely resembles the Clee Hill 

 rock, and it may be suggested with some probability that the 

 Bartestree dyke is of the same age as the Clee Hill intrusion. The 

 basalt in places shows patches with an imperfect variolitic structure. 



Admission of Wojien to Fellowship ok Associateship in the 



Geological Societt of London. 

 A Special General Meeting was held before the Ordinary Meeting on 

 Wednesday, June 17th, at 7.45 p.m., in order to consider the following 

 resolution, proposed by Dr. J. Malcolm Maclaren and seconded by 

 Mr. A. Gibb Maitland: — 



" That Fellows non-resident in the United Kingdom be invited to express 

 an opinion concerning the Admission of Women to Fellowship or Associateship 

 of the Geological Society of London." 



This resolution was passed by 30 votes to 11. 



The next Ordinary Meeting of the Society will be held on 

 Wednesday, November 4th, 1908. 



II. — MiNEKALOGicAL SociETY. — June \&th, 1908. Professor H. A. 

 Miers, F.R.S., President, in the Chair. 

 On a nickel-iron alloy (Pej !Nig) common to the meteoric iron of 

 Youndegin and the meteoric stone of Zomba, by L. Fletcher. In the 

 case of the Zomba meteoric stone the gradual increase of nickel in 

 the residue after repeated extraction of the nickel-iron with mercuric 

 ammonium chloride was previously attributed to rusting. It is now 

 explained by the presence in the nickel-iron of a component not easily 

 affected by the mercuric solution, and containing 38-50 per cent, of 

 nickel. This component is identical with the ' tsenite,' containing about 

 the same percentage of nickel, which was separated from the Youndegin 

 iron by its insolubility in dilute hydrochloric acid. — On Kaolinization 

 and other changes in West of England rocks, by F. H. Butler. The 

 author pointed out that the gaseous emanations of a granitic magma, 

 which are carried upwards and discharged externally, gradually bring 

 about considerable pneumatolytic changes. jSTotable among these are 

 increased vesicularity in the quartz of the peripheral part of granitic 

 intrusions and their offsets, the elvans, also the assumption by that 

 mineral of the idiomorphic form, and the production of tourmaline. 

 The occurrence of tourmaline in rocks exemplifying various stages in 

 metasomatism indicates long-continued supply of boron compounds 

 from abysmal regions. The primary, usually brown, tourmaline in 

 the altered acidic rocks is commonly found to have been eroded, 

 doubtless owing to alkalinity of the kaolinizing solution, before 

 dekaolinization and the consequent formation of acicular schorl 

 ushered in a final deposition of quartz. The view of Professor Yogt 



