Name Jarrah (Eucalyptus marginata)
Type Hardwood.
Other Names Also known as Eucalyptus.
Sources Grows in south western Australia.
Appearance Typically straight grained but often interlocked and wavy. Moderately coarse, even texture. Rich dark reddish brown heartwood, often with gum veins and boat-shaped flecks. Paler reddish brown sapwood.
Physical Props Heavy, hard, strong (particularly crushing strength), and stiff with moderate dimensional stability in service. Highly decay resistant heartwood. Steam-bends moderately well.
Working Props Fairly difficult to work due to hardness and density. Reduced cutting angle recommended for planing. Turns well. Pre-drilling required for screwing and nailing. Glues and finishes well.
Uses Used extensively for construction in Australia, particularly for marine applications such as bridges, dock pilings, wharfs, and ship building. Also used for flooring, cross-ties, shingles, siding, trim, rafters, joists, furniture, interior joinery, chemical vats, and decorative veneers. Valued for striking tool handles.
Comments More jarrah is harvested than any other commercial Australian timber. It is more appropriate than Karri for marine applications but it's not quite as heavy or as strong.

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Name Jelutong (Dyera costulata)
Type Hardwood.
Other Names Also known as jelutong bukit, jelutong paya.
Sources Grows in Malaysia, Borneo, and Sumatra.
Appearance Straight grained with fine, even texture. Creamy-white sapwood and heartwood, maturing to a pale straw-yellow.
Physical Props Light, soft, brittle, and weak with good stability in service, low decay resistance, and a poor steam bending rating.
Working Props Works easily with both hand and power tools and planes to a nice, clean surface. Glues, screws, and nails without difficulty. Stains, paints, and varnishes fairly well.
Uses Popular for model making, patterns, wooden shoes, battery separators, and drawing boards. Also used for interior joinery and corestock for doors. Excellent wood for carving and sculpture due to its softness. Latex in the wood is extracted for chewing gum.

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