TUART 



Anatomical Characters. Transverse section : 



Pores. Need lens, small, inconspicuous, size 4, little varia- 

 tion : rather regularly distributed in bands : oblique strings are 

 only visible in well-grown rings, the pores are otherwise too 

 crowded : usually single, but frequent subdivided pairs : each 

 group of pores separated from others by a ray : many, 70-120 

 per sq. mm. : appear lighter than the ground : many with white 

 contents. 



Rays. Difficult to see with the lens, size 5^6, uniform : equi- 

 distant : less than a pore-width apart : avoiding the pores more 

 or less : light-coloured threads : rarely straight at any point : 

 many, 12-16 per mm. : scarcely denser than the ground-tissue. 



Rings. Fairly clear : colour-bands very clear to the naked 

 eye : boundary a line of contrast and often a zone poor in pores : 

 contour in long waves approaching and receding from each 

 other, causing the rings to become alternately broad and narrow. 



Soft-tissue. Inconspicuous, very narrow borders encircling 

 the pores, sometimes joining them up to oblique strings. 



Pith. ? 



Radial Section. The pores are fine, scarcely visible lines, 

 partially filled with brown resin or some with a white deposit 

 which is visible to the naked eye, especially where they cross 

 the denser zones. Rays inconspicuous, minute, dull, white 

 lines, visible in certain lights only. 



Tangential Section. As the Radial, but the rays are practically 

 imperceptible with microscope (2 inch objective). The rings 

 are readily traceable, almost prominent. 



Type specimen authenticated by the Forest Officer to the 

 Government of Western Australia. 



This is one of the small-pored Eucalypti, and is allied to the 

 York Gum (E. loxophleba) in point of structure. 



No. 104. TUART. Eucalyptus gomocephala. D.C. 



As FIG. 69. PLATE VIII. 



Natural Order. Myrtaceae. 



Alternative Names. White Gum (60). Tewart, Tooart, etc. 



Source of Supply. Western Australia. 



Physical Characters, etc. Recorded dry-weight, 72-75 Ibs. 

 per cu. ft. Hardness Grade 4, compare Maple. Smell and taste 

 none. Burns well with a short, lively, crackling flame and a 

 slight tarry smell ; embers glow in still air : ash, grey. Solution 

 with water, dirty yellow. 



Grain. Sinuous, cross-grained, rather fine and open. Su 

 oily-looking, the ground-tissue greasy when cut with a knife : 

 pores dull. 



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