( 901 ) 

 PROCEEDINGS OF THE SOCIETY. 



Meeting of 11th October, 1882, at King's College, Strand, W.C, 

 The President (Professor P. Martin Duncan, F.E.S.) in 

 the Chair. 



The Minutes of the Meeting of 14th June last were read and 

 confirmed, and were signed by the President. 



The List of Donations (exclusive of exchanges and reprints) 



received since the last meeting was submitted, and the thanks of the 



Society given to the donors. 



From 



Dippel, L. — Das Mikroskop, &c. ler Theil, le Abtheil. 2ml 

 ed., viii. and 336 pp. and 189 figs. (8vo. Braunsch- 

 weig, 1882) The Author. 



Dodel-Port, A. and C. — Auatoniisch-physiologischer Atlas 



der Botanik. Part 6 .. The Authors. 



English, J. L. — A Manual for the Preservation of the larger 



Fungi, &c. viii. and 41 pp. (8vo. Epping, 1882) .. Mr. Crisp. 



Micrographic Dictionary. 4th ed. Parts 13-15 Mr. Van Voorst. 



Mr. Stewart called the special attention of the meeting to Dr. 

 Dodel-Port's diagrams (in continuation of the series), which were not 

 only executed with admirable effect, but were also exceedingly correct 

 and of great use for the purposes of the lecture-room. 



Mr. Beck exhibited a slide of Bacillus tuberculosis prepared by 

 Dr. H. Gibbes by the new process he had devised (see p. 895). 



Mr. Beck also exhibited and described a new " Lithological 

 Microscope " (see p. 847). 



Mr. Stewart thought that whilst there were many admirable points 

 about the instrument, yet that, in use, the movement of the polarizing 

 prism might work loose in course of time through being on a hinge 

 joint, and he suggested that it would be found an improvement to have 

 an arrangement shifting in a plane parallel to the stage. 



The President said that the subject which Mr. Beck's Microscope 

 was intended to facilitate — now known as Petrology — was a branch of 

 geology which was of extreme interest and importance, and which 

 had made gigantic strides in recent years, so that there were now 

 many geologists who confined their attention to the examination of 

 rock sections. In the course of such observations, the constant 

 shifting of the prisms was extremely tedious, and some remedy for 

 this was indispensable. The important question was, which of the 

 various methods was the easiest ? In looking at the instrument as it 

 stood, he thought that the necessary movement could be effected more 

 easily as Mr. Beck had constructed it than by a lateral movement as 

 suggested by Mr. Stewart. This branch of geological study was, he 

 considered, a most desirable one for the Fellows to take up. It in- 



