CXXxiv PROCEEDINGS OP THE GEOLOGICAL SOCIETY [Aug. I906, 



Miss Breton, was read respecting the formation of Popocatepetl 

 (' smoking mountain ? ), showing how the successive periods of 

 volcanic energy may be marked (a) by a period of lava-flow, (6) by 

 one of breccia, and finally (c) by one of ashes. The angles of slope 

 of the volcanos were drawn to scale. 



Prof. H. J. Johnston-La vis exhibited upwards of forty lantern- 

 slide views, to illustrate the late eruption of Yesuvius and 

 its effects. Nearly all these were taken by the exhibitor, who 

 explained the different phenomena portrayed. 



In addition to the exhibits mentioned above, the following 

 specimens, etc. were exhibited : — 



Photographs exhibited by Prof. T. W. Edgeworth David, F.E.S., 

 F.G.S., in illustration of the paper by Messrs. F. Chapman & 

 D. Mawson. 



Specimens, casts, and drawings, exhibited by Prof. E. J. Gar- 

 wood, M.A., Sec.G.S., in illustration of the paper by Miss Jane 

 Donald. 



Halite in fine crystals, from a portion of the old cone ejected in 

 the recent eruption of Vesuvius, exhibited by Prof. H. J. Johnston- 

 Lavis, M.D., F.G.S. 



June 13th, 1906. 



Sir Archibald Geikie, D.C.L., Sc.D., Sec.E.S., President, 

 in the Chair. 



Joseph Davies, M.Australasian Inst.M.E., Mine-Manager, Bulong 

 (Western Australia) ; James Francis, 26 Horton Boad, Hackney, 

 N.E. ; Charles E. Hewitt, Mining Engineer, London Eoad, Derby ; 

 Owen Thomas Jones, Geological Survey of England, Blaenffynon, 

 Newcastle Emlyn, S.O. (Caermarthenshire) ; Edward Arthur de 

 Lautour, Mining Engineer, Magnet (Tasmania); John M. Milton, 

 8 College Avenue, Crosby, Liverpool ; James Cowie Simpson, junr., 

 The Avenue, 40 Greenhill Gardens, Edinburgh ; and Bichard 

 Fletcher Whiteside, M.LM.E., 62 Fern Grove, Sefton Park, 

 Liverpool, were elected Fellows of the Society. 



The List of Donations to the Library was read. 



The Names of certain Fellows of the Society were read out for 

 the first time, in conformity with the Bye-Laws, Sect. VI, Art. 5, 

 in consequence of the Non-Payment of the Arrears of their 

 Contributions. 



The following communications were read : — 



1. 'Eecumbent Folds produced as a Eesult of Flow.' By 

 Prof. William Johnson Sollas, Sc.D., LL.D., F.E.S., F.G.S. 



