332 PaOCEEDINGS OF SECTION D. 



was sent to Broken Hill for experimental purposes, and so it was 

 in this differentiated material of species that the correct industrial 

 value of eucalyptol, phellandrene, and other constituents of oils 

 were placed in this connexion. By a system of " lumping of 

 species " mixed oils would obtain, and so the commercial or 

 economic results would be negative. 



What a fatal commercial error it would be to systematically 

 place E. laevopiuea and E. deztropinea together with E. macro- 

 rhyncha under the same specific name, for no pinene is to be 

 found in the latter, nor any eucalyptol in the two former — a pro- 

 nounced constituent in E. macrorhyncha oil, and the same re- 

 marks apply throughout the members of the whole genus. 



It is on such lines as these that all our research work on the 

 products of eucalypts have been carried out, and this characterizes 

 the whole investigation. 



Historical. 



A knowledge of the economics of these trees has been insepar- 

 able from the genus since its first discovery by the scientific world, 

 for the first name bestowed on it — aromadendrum — referred to the 

 presence in the leaves of the volatile oil now so world-famed; and 

 so with other species names. The name E. piperita was bestowed in 

 1789 for a similar reason, and at the same time the name E. 

 resinifera was also given in allusion to a chemical constituent. 

 Even to the present day, tlieir wonderful economics have always 

 appealed to man — not only the Australian, but especially the 

 American, and others. 



Eucalyptus was the first timber exported, being nearer the sea- 

 coast and closer to the initial port than " cedar." 



From then to the present time the products of these wonderful 

 trees have been exploited to the extent of almost extermination of 

 certain species, such as " ironbarks." In the sixties, seeds of these 

 trees were introduced into Southern Europe, and later America, 

 where millions of acres are now under eucalyptus cultivation. 



In the last decade. South Africa has planted vast areas with 

 these trees, and South America is now coming into the field. 



Fronrt the attention now given by Forestry to these trees, it is 

 evident that they are destined to rank as the premier forest trees 

 of the world. 



Eucalyptus Culture. 



It seems a paradox that almost all data in this connexion is to 

 be found in American publications. 



