116 SELECT PLANTS FOR INDUSTRIAL CULTURE 



preparations : camphor, pine resins, mastic, elemi, sandarac, kauri, 

 dammar, asphalt, xanthorrhsea resin, dragon's-blood, benzoe, copal, 

 amber, anime, shellac, caoutchouc, also wax, but not gutta-percha. 

 These substances are arranged here in the order of their greatest 

 solubility. The potash obtainable from the ashes of various Euca- 

 lypts varies from 5 to 27 per cent. One ton of the fresh foliage of 

 E. globulus yields about 8J Ibs. of pearl ash, a ton of the green 

 wood about 2J Ibs., of dry wood about 4J Ibs. For resins, tar, 

 acetic acid, tannin, and other products of many Eucalypts, see 

 various documents and reports of the writer, issued from the 

 Melbourne Botanic Garden. 



Eucalyptus Baileyana, F. v. Mueller. 



South Queensland. A tree about 100 feet high; bark remarkably 

 tough (Bailey). The timber splits easily, and is tough and durable, 

 thus locally used for fence-posts and similar purposes (A. Williams). 

 This species, unlike most congeners, can be grown to advantage 011 

 sandy soil. Branches more spreading and foliage more dense than 

 that of most other Eucalypts. 



Eucalyptus botryoides, Smith.* 



From East Gippsland to South Queensland. Vernacular name 

 Bastard Mahogany, and a variety called Bangalay, the latter gene- 

 rally found on coast-sands. One of the most stately among an 

 extensive number of species, remarkable for its dark-green shady 

 foliage. It delights on river-banks. Stems attain a length of 80 

 feet without a branch, and a diameter of 8 feet. The timber 

 usually sound to the centre, adapted for water-works, waggons, par- 

 ticularly for felloes, knees of boats, &c. Posts of it very lasting, as 

 no decay was observed in fourteen years ; it is also well adapted for 

 shingles. The Rev. Dr. Woolls, Mr. Kirton, and Mr. Reader all 

 testify to its general excellence. 



Eucalyptus calophylla, R. Brown. 



South-West Australia, where it is vernacularly known as Red- 

 gum-tree. More umbrageous than most Eucalypts and of compar- 

 atively rapid growth. In its native forests it has quite the aspect 

 of the eastern Ironbark-trees. The wood is free of resin when 

 grown on alluvial land, but not so when produced on stony ranges. 

 It is preferred to that of E. marginata and E. cornuta for rafters, 

 spokes, and fence-rails, also used for handles and agricultural 

 implements ; it is strong and light, but not long-lasting under- 

 ground. The bark is valuable for tanning, as an admixture to 

 Acacia bark ; the seed vessels of this and perhaps all other Euca- 

 lypts can be used for the same purpose. The stem of this tree 

 may occasionally be observed 10 feet in diameter ; it is the only 



