178 WOODS OF COMMERCE 



well It yields timber 18 ft. long and a foot square, and is used for 

 door-frames, wheel-hubs, etc. 



Guijo. See SaL 



Gum, a name referring mainly to the many and valuable Aus- 

 trahan and Tasmanian species of the Myrtaceous genus Eucalyptus, 

 the identification and synonymy of many of which is much in- 

 volved. 



Gum, Apple-seented {Eucalyptus Stuartidna F. v. M.). Eastern 

 Australasia. Frequently called *' Turpentine " or ''Peppermint- 

 tree"; in Tasmania "Red Gum"; in Victoria also ''Mountain 

 Ash " or " Apple-tree "; in New South Wales " Woolly Butt "; 

 in Queensland " Box " or " Tea-tree." Introduced m the Punjaub. 

 Height 40— 90 ft. ; diam. 2— 4 ft. S.G. 834— 1,050. W 66 Light 

 red-brown, wavy, hard, difficult to split, with gum-veins, weak, but 

 said to be durable underground, polishing well. Used for ships' 

 planks, sleepers, fence-posts, and rough furniture. 



Gum, Bailey {E, Baihydna ¥, v. M.). Southern Queensland. 

 "Rough Stringybark." Large, hght-grey, very tough, suitable 

 for tool-handles. 



Gum, Bally. See Bally Gum. 



Gum, Bastard. See Gum, Cider. 



Gum, Black, in ISforth America {Nyssa uni flora Wangenh. == 

 N, tomentosa Michx.). See Tupelo. 



Gum, Black, in South.'-'EsiBt Aa^tmlisb {Eucalyptus stelluldta Sieb.), 

 known also as " White, Green," or " Lead Gum," " Sally," and 

 " Box," from 12 — 50 ft. high and 1^ — 3 ft. in diam,, but used only 

 as fueh 



Gum, Blue [E, globulus Labill.). South-Eastem Australasia. 

 Introduced into India, South Africa, California, and Southern 

 Europe as a supposed preventive of malaria. Height 200 — 

 —350 ft.; diam. 6—25 ft. S.G. 698—1,108. W 43—75. 

 e' 1-75. p' '88, c 6,048. c' -798. v' -915. Pale straw-colour, 

 hard, heavy, moderately strong, tough, elastic, with curled and 

 twisted grain, planing well, durable, partially immune from Teredo ; 

 pith-rays very numerous, fine ; pores moderate-sized, round, grouped 

 or in lines. Used for fence-rails, telegraph-poles, bridge-buildings 

 piles, shipbuilding, felloes, shafts, spokes, and implements ; exten- 

 sively for carriage-buildings, and formerly for sleepers, for which 

 E. rostrdta is now preferred ; and classed in the third-line of Lloyd's 

 Register for ship-building. The whalers of Hobart Town were 

 built of this wood, the most durable of Tasmanian hardwoods. It 

 is preferred to Jarrah or Karri for the piles driven in advance o£ 



