ABSTRACT OF PROCEEDINGS. xiii, 



ABSTRACT OF PROCEEDINGS, JULY 6, 1898. 



The General Monthly Meeting of the Society was held at the 

 Society's House, No. 5 Elizabeth-street North, on Wednesday 

 evening, July 6th, 1898. 



The President, G. H. Knibbs, f.r.a.s., in the Chair. 



Twenty-eight members and two visitors were present. 



The minutes of the preceding meeting were read and confirmed. 



The following gentlemen were duly elected ordinary members 

 of the Society : — 



Beale, Charles Griffin; 109 Pitt-street. 

 Boyd, Robert James, b.e. Univ. Syd. ; Terara. 

 Gurney, Elliott Henry; Petersham. 

 Smith, S. Hague; 81 Pitt-street. 

 Wark, William; 9 Macquarie Place. 

 Wildridge, John, m.i.m.e.; 97 Pitt-street. 



The certificates of three candidates were read for the first time. 

 the following papers were read : — 

 1. "On the Stringy bark trees of New South Wales, especially 

 in regard to their essential oils," by R. T. Baker, f.l.s., and 

 Henry G. Smith, f.c.s., Technological Museum. Part I. 



This paper is the authors' third contribution to a knowledge of 

 the essential oils of the genus Eucalyptus. Some notes on the 

 classification of the species of this genus by other authors are 

 given, and the species now investigated are arranged according 

 to their chemical, economic, and botanical affinities. It was 

 shown that the essential oil of the Red Stringybark, E. macro- 

 rhyncha besides containing a large percentage of eudesmol (the 

 stearoptene of eucalyptus oil) gives an oil of excellent quality 

 containing over fifty per cent, of eucalyptol, and answering all 

 the requirements of the British Pharmacopoeia with the excep- 

 tion of that of specific gravity. The authors point out that by 

 fixing the specific gravity of an Eucalyptus oil as high as 0*910 

 excellent oils might be considered as of inferior quality, while 



