192 Select Plants for Industrial Culture and 



of air ; the volatile oil is very antiseptic. The ail remains in high 

 repute ; its unpleasant-smelling and cough-producing ingredients 

 distil over first, and can therefore easily be separated ; thus a refined 

 oil of uniformity is obtained. It contains at least 60 per cent. 

 Eucalyptol, and is free from Phellandrene. The oil is now distilled 

 also in Algeria on a large scale for medicinal and technic purposes 

 [Schimmelj. It comes likewise into commerce from the Neilgherry- 

 Hills [S. G. Wallace]. The annual export of it from California has 

 already reached 20,000 Ibs. [J. R. Jackson]. Oil of this or any 

 other Eucalypt internally administered should, even in cases of 

 adults, not exceed some few drops in single doses. Mr. G. Downie 

 discovered that with decotions of Eucalyptus-leaves the scales can be 

 removed from boilers [J. R. Jackson]. This tree, particularly when 

 in an unhealthy state, is at Melbourne apt to be bored by the larvae 

 of a large moth [Endoxyla Eucalypti] and also by two beetles 

 [Hapatesus hirtus and particularly Phoracantha tricuspis], as noticed 

 by Mr. Ch. French. Seeds will keep for several years, admit of easy 

 transmission abroad, and germinate quickly ; but a tree of such 

 celerity in growth and of such vast final dimensions wants necessarily 

 soil open to great depth for full scope to its roots, to attain unimpaired 

 development. Regarding the comparative strength of this and various 

 other timbers, the result of the tests, instituted and tabulated by 

 the Carriage-timber Board of the Victorian Railway Department, 

 much under the leading of Mr. Clement Hodgkinson, may be referred 

 to in the Progress Reports of the Victorian Royal Commission on 

 Vegetable Products [p. 477-490]. Colonel Warren reports from 

 San Francisco, that branchlets of Eucalypts will drive mosquitoes 

 and other insects out of rooms. To apiarists the tree is so far of 

 particular importance as it flowers in the cool season. Seeds of this 

 momentous tree were sent to Europe by the writer of this work 

 already in 1853. 



Eucalyptus gomphocephala, De Candolle.* 



The Tooart of South-Western Australia ; attains a height of 120 

 feet, the clear trunk a length of 50 feet. The wood is tough, heavy 

 and rigid, the texture close and the grain so twisted as to make it 

 difficult to cleave. It shrinks but little, does not split while under- 

 going the process of seasoning, and is altogether remarkably free 

 from defects. It will bear exposure to all vicissitudes of weather 

 for a long time, and is particularly valuable for large scantling, 

 where great strength is needed ; in ship-building it is used for beams, 

 keelsons, stern-posts, engine-bearers, and other work below the 

 flotation ; recommendable also for supports of bridges, framing of 

 dock gates and for wheelwrights' work ; indeed it is one of the 

 strongest woods known, whether tried transversely or otherwise 

 [Laslett]. Grew in seven years to a good-sized tree in South-France, 

 and so did the following species, as well as E. diversicolor, E. 

 botryoides, E. Gunnii, E. polyanthema and E. viminalis [Naudin]. 



