330 PROCEEDINGS OP SECTIOND. 



17. BOTANICAL TEACHING IN SUPERIOR PUBLIC AND 

 SECONDARY HIGH SCHOOLS IN NEW SOUTH WALES. 



By Miss Sarah Uynes, B.A. 



18. NOTE ON AN EXHIBIT. 



By G. A. Waterhouse, B.Sc, B.E., F.E.S. 



Mr. G. A. Waterhouse exhibited two gynandric specimens of 

 the Butterfly Papilio aegeus from Australia, together with the 

 normal male and female. One specimen exhibited by courtesy of 

 Mr. J. A. Kershaw, of the National Museum, is wholly male on 

 the left-hand side, whilst on the right it is chiefly female, with a 

 small percentage of male scales. The second specimen is chiefly 

 male, but each wing surface bears a large number of female 

 markings. 



19. CONTRIBUTION TO A DISCUSSION ON THE 

 ECONOMICS OF THE EUCALYPTS.i 



By R..T. Baker, F.L.S. 

 Preamble. 



At the Sydney meeting of the A.A.A.S., 1910, it was resolved 

 that a discussion on the Economics of the Eucalypts, the outcome 

 of the research of Messrs. Baker and Smith, be held at the next 

 Melbourne meeting in 1913. This discussion to be held before the 

 Biology and Chemical Sections, Messrs. Baker and Smith opening 

 the proceedings. 



The following is a resume of their respective portions of the 

 subject matter upon which the discussion took place. 



l7itroduction. 



On the last occasion when this Association met in Sydney, my 

 colleague, Mr, H. G. Smith was too ill to read his chemical paper 

 and the privilege of doing so fell on me, and so I had an oppor- 

 tunity of appearing as a " chemist." However, my colleague is 

 here to-day, and so can speak for himself. 



In this discussion, we are, I take it, limited by the necessities 

 of the case to the economics of the genus. Still, whilst discussing 

 these economics, we must ever be mindful of the fact how much 

 applied science is indebted to pure science; in fact, the former is 

 built up on the latter ; one is the foundation and the other the 

 superstructure. 



'. .S'e« also Section B. 



