of the tract may bo classified as upland. • Cno of the reasons 
why the logs obtained from the uplands are of better form is that 
on the slopes, and especially on the very steep slopes the light 
. 
can more easily penetrate the crown coyer from the side and reach 
the relatively young trees and encourage their growth from youth u 
up, thus minimising the struggle for light, and the result is 
that a greater proportion of the logs available are sound. She 
total yield of ays liable lumber per aero is not larger, however, 
than on the lowland, because the majority of the largo trees are 
, 
crepo for which there is no known use end naturally would not .be 
in a lu bering^perction. 
Forest frees 
She forests on the West Coast of Panama Republic do not 
contain so long s list of itapMir'tTTTfc tree fa might be expected. 
Ag^alg esd y - etotea- ^feo- laxgauti^usus.,.aze-see^fewed-- and in no pl£,ee"1lo 
does one cpecTe-S'-p.ijedominate to the exclusion of .all others. If 
the lumberman desires to procure the wood of only one or two kinds 
he is obliged to cover a large area from whichtto drew hie cucto 
1 n£-~'± 0 'gs. * Resides the well-known cedar and mahogany in the Panama 
forests there are j ^p.v rn r kinds of timber that sre generally util 
ised for 1 oab er . lie mii'i;i f cthb.. 
'hVt ' '* Among those tasss* whieh may be regarded as valuable by 
the paio e ppottnv pimm&ter, er-tlio lumberman sre the following: 
Espave Unacardium rhinocar puc) 
I’hie is the most conspicuous timber tree in the lowland 
a & clP» v CHp- 
type of forest. It is the moat easily awMebMo tree, and because 
of its large size and often long^ straight and cylindrical trunk, 
several attempts have been made to introduce the wood into the 
American markets m &o * '■ vetrtto Kr-Tt t'mome g' S- ; 
- or Ranogu LLiaUD^Cny '. The tree is found in all parts of the tract 
