PHILIPPINE WOODS. 
365 
• Diffuse porous .- — With the vessels 'of approximately uniform size and 
shattered through the ring. 
Wherever, the rings have seemed to be doubtfully distinct, the wood 
has been included in both sections of the key. This will explain why a 
number, of woods are found more than once. 
Unless especially otherwise indicated, the color credited : to a given 
wood is that of the heartwood. 
In using this key, no special equipment is needed beside a sharp jack- 
knife and a small lens capable of magnifying as much as five diameters. 
The end of the block used should be carefully smoothed with the knife, 
so that the different structural features may be seen with the lens. 
Ordinarily, the cross section is the only one used, as it shows nearly all 
of the points which it is necessary to observe. 
The figures used to illustrate this key have been made with a uniform 
magnification of about five diameters. 
Key to Philippine commercial woods. 
a. Nonporous woods Benguet pine (see fig. 1). 
Oregon pine. 
California redwood. 
aa. Porous woods. 
' 6. Seasonal rings distinct. 
c. Ring porous. 
d. Wood parenchyma in wavy, tangential lines. 
e. Tangential section showing faint, parallel, transverse lines; distinct, 
sweetish, cedary odor ; wood coloring water a fluorescent blue. 
Narra (see fig. 2). 
ee. Not as above. 
f. Pale to dark red Banaba ( see fig. 3 ) . 
/f. Brownish to dark brownish; vessels containing glistening dark- 
colored deposits r. Batitinan (see fig. 4). 
dd. Parenchyma lines wanting. 
e. Moderately heavy to heavy and hard; yellow to very dark brown; 
strong, spicy odor Teak (see fig. 5). 
ee. Light and soft; red; cedary odor Calantas' (see fig. 6). 
cc. Diffuse porous. 
d. Wood parenchyma prominent. 
. e. In concentric lines. 
f. Pith-rays very small. 
g. Wood soft and white, with bitter taste Dita (see fig. 7). 
gg. Not white. 
h. Wood forming a lather when rubbed with water or saliva; ves- 
sels in oblique radial lines. 
i. Very hard and heavy; very dark red Bansalaguin. 
ii. Lighter in weight and color; not quite so hard. 
Betis (see fig. 8). 
hh. Wood not forming a lather when rubbed. 
i, Vessels medium size, scattered, not numerous; wood paren- 
chyma lines Very distinct ||H|Liusin (see fig. 9). 
