and was entitled, "The Microscope in Petrology." The lecturer dealt 

 skilfully with this very diflBcult subject, and dwelt upon the value of 

 polarised light as a means of distinguishing between and identifying different 

 classes of minerals, and as an aid in arriving at correct opinions as to the 

 methods of formation of the igneous rocks. A short discussion ensued, in 

 which Messrs. Thompson, Walker and Bea.slet took part, and the 

 meeting then resolved itself into a Conversazione, at which the following 

 objects were exhibited : — 



Eock Sections — Mica plates, showing interference figures... A.R.Dwerrthouse. 



Obsidian, showing Pcrlitic structure A. F. Dumergue. 



Altered RhyoJite, showing Spherulitic structure F. C. Larkin. 



Corriefrills Ditchi^tone J. Davies. 



Microclinic Graphic Granite (polarised) C. H. H. Walker. 



Hornblende Granite ( do. ) A. T. Smith, Jun. 



Microcline ( do. ) F. N. Pierce. 



Jasper and Ametliyst ( do. ) Wm. Oelrichs. 



Agate and Chalcedony { do. ) JoHS Newton. 



Jasper ( do. ) J. M. Williams. 



Co.il Sections (Lancashire) Frank Tate. 



Do. W. Woolcot. 



Pegmatite W. H. Read. 



Roestelia cornuta Thomas Birks. 



Tradescantia virginica (Staminal Hairs) W.m. Narramore. 



Nais proboscidce— J. Gould. 



Heads of Taenia saginata and Taenia mediocaiMllata... H. E. Davies. 



December \st. —iiLT. Herbert E. Davies, M.A., B.Sc, read a Paper on "The 

 Cholera Bacillus." The subject was thoughtfully discussed from various 

 points of view, the discoveries of Pasteur, Koch, and other scientists, 

 being brought into evidence, with, however, the general result of showing 

 that, though much has become known regarding the habits and developing 

 capabilities under varying conditions of the organism which causes the 

 dreaded scourge of Cholera, a good deal has yet to be learned. After the 

 reading of the Paper, for which Mr. Davies was cordially thanked, a 

 Conversazione was held, at which the following objects were exhibited : — 



Bacillus Anthracis in blood \ -nr v.pp.vnpR, 



Bacillus from Maize infusion ) *^- -^ARRAMORK. 



Finkler's Comma Bacillus Herbert E. Davies. 



Kocli's Cholera Bacillus H. R. Jones. 



Koch's Comma Bacillus Wm. Oelrichs. 



Cholera Bacillus Wm. M. Read. 



Porphyritic Basalt (polarised) Robt. Nicholson. 



Sting of Hornet A. F. Du.mergue. 



Section of Eucalyptus J. M. Williams. 



Seaweed F. N. Pierce. 



Living objects — 



Volvox globatar John Newton. 



Actinophrys sol A. T. Smith, Jun. 



