182 WOODS OF COMMERCE 



"building, cogs, etc. The name is also applied to E, tereticornis. 

 [See Gum, Mountain.] 



Gum, Sour. See Gum, Black. 



Gum, Spotted, a name applied to Uucalyptus capitelldta [See 

 Stringybark, White], B. goniocdlyx [See Box, Bastard], E, hcemd- 

 stoma [See Gum, Scribbly], and T. macuUta Hook. This last-men- 

 tioned species, native to Eastern AustraHa, reaches 100 — 150 ft. 

 in height, and 3--8 ft. in diam. S.G. 1,035—1,170. W 60—67. 

 Light yellow to wahant-brown, sometimes with a wavy figure, 

 heavy, close but very coarse in grain, with large gum- veins, strong, 

 tough, durable. In great demand for paving, girders, bridge, and 

 ship-building, shafts, naves, shingles, etc. It fetches 2s. a cubic 

 foot in London. 



Gum, Sugar {E, corynocdlyx F. v. M.). South AustraHa. Height 

 120 ft. ; diam. 6—6 ft. Yellowish-white, very heavy, hard, strong 

 and durable, termite- and teredo-proof, not warping. Used for 

 sleepers, piles, planks, fencuig, wheels. The name is also applied 

 to E, Gunnii, [See Gum, Cider.] 



Gum, Swamp, See Gum, Cider, Manna, and Mountain White. 



Gum, Sweet [Liquiddmbar styraciflua L. : Order Hamameldcece). 

 Eastern United States. " Bilsted " or '' Red Gum," " Californian 

 Red Gum " (though shipped from New Orleans). " Satin Walnut,'' 

 " Hazel Pine." French '' Copalm," Germ, '' Storaxbaum," Span, 

 " Liquid-ambar." Height 100 ft. or more ; diam. 4 — 5 ft. S.G. 

 591. W 36-8 — 59-5. R 651 kilos. Sapwood cream-white ; heart 

 irregular, reddish-brown, with dark false rings, rather heavy, 

 close-grained, soft, tough, free from knots, taking a satiny polish, 

 warping and twisting badly in drying, unless first steamed. Used 

 for furniture, veneers, turnery, shingles, and clap-boards, and, 

 though little suited for the purpose, for paving. It is commonly 

 supposed in the timber- trade that " Hazel Pine " is merely a trade 

 name for the sapwood and " Satin Walnut " for the heart, whilst, 

 with equal ingenuity, the wood when offered for paving purposes 

 was dubbed " Californian Red Gum." As a matter of fact, whilst 

 the so-called Satin Walnut is often beautifully marked with the 

 rich dark stripe of the false rings, which makes it a favourite wood 

 for cheap furniture, the so-called Hazel Pine is the same species 

 grown in low-lying, swampy districts where the dark colouring- 

 matter is not developed. The vessels are filled with a hygroscopic 

 gum, which renders the wood very susceptible to changes in the 

 moisture of the atmosphere, and causes it to both twist longitudin- 

 ally and warp transversely. Satin Walnut is, therefore, only used 

 for cheap bedroom furniture, not being fit for rooms in which fires 

 are Ht. The Hazel Pine is largely imported in planed boards, 



