XVI. ABSTRACT OP PROCEEDINGS. 



Orthography; the Tyattyalla language; the Tyapwurra and 

 Wuddyauro dialects; the Thaguwurru language ; the Woi- 

 wurru dialect ; the Kunnai language ; vocabulary of Tyat- 

 tyalla and Kunnai words. 



3. "The Parks of Sydney; some of the problems of control 

 and management," by J. H. Maiden, f.l.s., Director 

 of Botanic Gardens and Domains, Sydney; Officer-in- 

 Oharge of the Centennial Park. 



This paper was read at the June meeting. A discussion 

 ensued in which the following gentlemen took part: — 

 Messrs. J. T. Wilshire, C. A. Benbow, P. N. Trebeck, H. 

 Deane, 0. O. Burge, Dr. T. Storie Dixson, Mr. A. Duck- 

 worth and Dr. F. H. Quaife. Mr. Maiden replied. 



The following is an abstract of the first Science Lecture 

 of the present Session, delivered on the 30th June by P. 

 Tidswell, m.b, M.ch., d.p.h., Health Department, on " The Role 

 of Bacteria in the Production of Disease." 



The lecture opened with an account of the discovery of 

 bacteria over two centuries ago by the Dutchman Anton 

 van Leeuwenhoek. Allusion was then made to the subse- 

 quent controversies concerning the origin of bacteria, and 

 their influence in causing disease, and the manner in which 

 their final settlement was effected by the researches of 

 Louis Pasteur some thirty years ago. Attention was then 

 directed to Pasteur's demonstration of the causal micro- 

 organism of a disease affecting silkworms, and of Davaine's 

 observations on the microbe of anthrax. It was shown 

 how these results stimulated investigation of the germ 

 theory, and how the proof of its correctness was rendered 

 possible by the elaboration of exact bacteriological methods 

 by Robert Koch. Mention was then made of the species 

 of bacteria which produce disease in man. There followed 

 a brief accouut of the structure and functions of bacteria 



