IN CEYLON. 39 
Tracheal 
Element. 
Fibres. 
Wood 
Paren¬ 
chyma. 
Medullary 
Rays. 
D. attenuata. 
Young twig, 6 mm. dia¬ 
meter 
Old timber, 140 mm. 
2-7 ... 
77*6 ... 
4*7 
... 15*0 
diameter 
0*88 ... 
83*84 ... 
3*94 
... 11*34 
D. Thwaitesii. 
Young twig, 3 mm. dia¬ 
meter 
1*33 ... 
81*3 ... 
4*6 
... 12*77 
Old stem, 200 mm. 
0-44 ... 
85*86 ... 
6*6 
... 7*1 
D. Toposia. 
Twig, 14 mm. diameter... 
Old stem, 250 mm. dia¬ 
0*9 ... 
80*0 ... 
7*8 
... 11*3 
meter 
0-5 ... 
81*2 ... 
7*6 
... 10*7 
D. sylvatica. 
Twig, 9 mm. diameter ... 
Old stem, 405 mm. dia¬ 
0*8 ... 
81*0 ... 
7Y 
... 11*1 
meter 
0-55 ... 
82*05 ... 
7*35 
... 10*05 
D. Melanoxyion. 
Twig, 10 mm. diameter... 
Old stem, 270 mm. dia¬ 
•2*9 ... 
81*2 ... 
5*1 
... 10*8 
meter 
1*2 ... 
81*6 ... 
7*1 
... 10*1 
D. Embry opter is. 
Twig, 9 mm. diameter ... 
Old stem, 310 mm. dia¬ 
1-2 ... 
83*3 ... 
4*3 
... 11*2 
meter 
0*6 ... 
85*1 ... 
7*1 
... 7*2 
D. quœsita. 
Twig, 15 mm. diameter... 
Old stem, 190 mm. dia¬ 
1*03 ... 
80*0 ... 
3*1 
... 15*87 
meter 
0-90 ... 
85*9 ... 
5*7 
... 7*5 
D. Gardneri. 
Twig, 14 mm. diameter... 
Old stem, 170 mm. dia¬ 
0*9 ... 
83*0 ... 
5*8 
... 10*3 
meter 
0-7 ... 
83*0 ... 
7*5 
... 8*8 
D. crumenata. 
Twig, 20 mm. diameter... 
Old stem, 210 mm. dia¬ 
1-0 ... 
81-4 
8*8 
... 8*8 
meter 
0-6 ... 
83*1 ... 
9*9 
... 6*4 
D. affinis. 
Twig, 9 mm. diameter ... 
Old stem, 200 mm. dia¬ 
1-5 ... 
84*5 ... 
5*8 
... 8*2 
meter 
0*3 ... 
91*6 ... 
3*7 
... 4*4 
This table is instructive as affording data to show the 
change which takes place in point of percentage number, as 
one passes from the oldest to the youngest xvlem, and also 
