ABSTRACT OF PROCEEDINGS. xix. 



Mr. H. G. Smith, President, in the Chair. 



Thirty-three members and two visitors were present. 



The minutes of the preceding meeting were read and 

 •confirmed. 



The certificates of three candidates for admission as 

 ordinary members were read for the second time. 



Messrs. 0. A. Sussmilch and R.H. Grieve were appointed 

 Scrutineers, and Mr. W. M. Hamlet deputed to preside at 

 the Ballot Box. 



The following gentlemen were duly elected as ordinary 

 members of the Society: — 



Richard Westman Challinor, f.i.c.,f.c.s., Technical 



College. 

 Edwin Oheel, Botanical Assistant, Botanic Gardens, 



Sydney. 

 Harold Eric Kuntzen, Manufacturing Chemist, 

 Australian Glue and Gelatine Works, Alexandria. 



The President made the following announcements: — 



1. That a Popular Science Lecture, entitled "Alkali, 

 Alkaloid, Alkohol," by Mr. W. M. Hamlet, f.i.c, would 

 be delivered in the Society's Hall, on September 18th, 1913, 

 at 8 p.m. 



2. That donations consisting of 3 volumes, 354 parts, 11 

 reports, and 3 maps, were laid upon the table. 



the following papers were read : 



1. "Notes on the rectifying property in Silicon and 



Selenium," by O. W. Vonwiller, b.Sc. 



2. "Ionisation caused by penetrating y rays in a closed 



thick-walled vessel," by S. E. Pierce, b.Sc, communi- 

 cated by Prof. Pollock. 



Brief Lecturette by J. H. Maiden, on those Prickly Pears 

 {Opuntias) which interest Australians, illustrated by 

 coloured drawings and fresh specimens. 



