THE TIMBERS OF COMMERCE 



Authorities. F. v. Mueller (80), p. 13. J. Ednie-Brown (17), 

 p. 27. 



Practically indistinguishable from the Morrel Gum (E. longi- 

 cornis), No. no, except by means of the bark. Also much like 

 all the red Eucalypti. 



Colour. Deep, rich red : blush-red : carmine : salmon-colour : 

 sap-wood pinkish white, to I inch wide, well denned (not 

 sharply) from the heart-wood. 



Anatomical Characters. Transverse section : 



Pores. Need lens, though the pore-groups are occasionally 

 visible, size 3, little variation, and that irregular : rather evenly 

 distributed, often forming oblique lines without actually touch- 

 ing each other : rarely subdivided groups or pairs, practically all 

 single : few, 10-35 P er sq- nun. : filled with beautiful carmine 

 resin, of which more than one globule is visible in each pore. 



Rays. Need lens, size 5-6 (nearer 6), uniform : equidistant, 

 much less than a pore-width apart, widely avoiding the pores, 

 rarely straight, crooked at the ring-boundaries : very weak, thin, 

 lighter-coloured threads : many, 16 to 22 per mm. 



Rings. Faintly indicated : boundary, a zone poor in pores : 

 contour regular or very gently undulating. 



Soft-tissue. Difficult to see, merely narrow borders encircling 

 the pores : lighter in colour, easily overlooked. 



Radial Section. Pores very fine, open grooves containing 

 brilliant, carmine resin : extremely tortuous, sinuous and re- 

 versed (cross-grained), interlaced to a greater degree than most 

 Eucalypti. Rays extremely minute, inconspicuous white lines. 

 Rings visible by the conspicuous change of direction in the pores, 

 and also the occasional smooth bands. 



Tangential Section. As the radial, except the rays, which 

 need the microscope, about o.i mm. high. When moistened 

 they appear as large-celled, spindle-shaped lines, of 6 to 7 cells 

 mostly containing resin. 



Type specimen authenticated by the Forest Officer to the 

 Government of Western Australia. 



No. no. MORRELL. Eucalyptus longicornis. 

 F. v. M. 



As FIG. 65. PLATE VIII. 



Alternative Names. Morrell Gum (17). The same popular 

 name is applied to E. microcarpa. 



Source of Supply. Western Australia. 



Physical Characters, etc. Recorded dry-weight, 66 Ibs. 

 per cu. ft. Hardness Grade 3, compare Blackthorn. Smell 

 faintly vinegary or none. Taste none. Burns badly, with a 



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