2 The Timbers of British Guiana. 



Rings. Ill-defined; boundary (?). A Pore-less zone, if any. 

 At a casual glance, the rings appear denned and of regular 

 contour, but the lens fails to verify the impression. Average 

 growth, 5$ rings per inch of radius in my specimen. 



Soft Tissue. Of definite arrangement; type of Pterocarpus, 

 i.e., in weak, irregular, light-coloured lines rather thicker than 

 the Rays, enclosing and connecting the Pores concentrically. 



Pith~( ?) 



Radial Section. Lighter in shade than the Transverse. The 

 Pores appear as fine, colourless scratches, and the soft tissue as 

 light-coloured lines, the Rays as minute, lustrous flakes. The 

 rings seem to be indicated by vague, darker, vertical streaks here 

 and there. 



Tangential Section as the Radial, but the Rays need the lens, 

 being minute white lines' about 25 m/m. high. 



Type Specimen. Authenticated by Bell, No. 1/2657. 



2. ANONA SP. 

 Nat. Ord., ANONACE^:. Native Name, " ARREWEWA " (2). 



Salient Features. A very hard, heavy, fine and close-grained 

 brown wood, suggesting inferior Greenheart. 



Physical Characters. Weight (so far recorded), 69J Ibs. per 

 cubic ft. Hardness, Grade 2, extremely! hard; compare Boxwood. 

 Smell and taste 0. 



Colour. Dark nut-brown, with perhaps a tinge of green. 

 Darkens a little on exposure to the air. Apparently a Sapwood 

 tree. Surface bright. 



Bark. About J in. thick and extremely hard, woody*; dark 

 brown within; smooth outside like that of Sycamore. Surface of 

 log beneath bark, finely striated. 



Uses, Qualities, etc. " Squares from 6-9 ins. axe-handles, 

 floor beams very durable " (2). Hard to saw. Fissile, takes nails 

 badly. Planes well though hard; turns hard but indifferently. 

 Takes a moderate finish. Of little, if any, value for export. 



Authorities. 2. Bell, p. 3. 



ANATOMICAL CHARACTERS. 



Transverse Section. Darker than the other sections. 



Pores. Visible with the naked eye from their light colour 

 Small, not diminishing towards the close of the season's growth, 

 little variation. Oval, mostly single. Evenly distributed, widely 

 scattered, 1 to 12 per sq. m/m. Mostly filled with a conspicuous 

 white deposit, which makes them visible in contrast with the very 

 dark ground. 



Rays. Visible with the lens, very fine ; uniform ; irregular but 

 about a Pore-width apart; weak but scarcely avoiding the Pores. 

 Red when moist. 



(* i.e., resembling wood rather than bark H.S.). 



