Moderately strong; woods (-southern Pine — Douglas Fir class) 



1, Yellow Sanders ( Buchen avia capitata), fhis species attains its best 

 development in the V/est Indies anJ on the northern edge of Gouth America. 

 Closely related species are found in the Amazon valley. Yellow Sanders 

 reaches a diameter of 3 feet and a height of 80 feet. Log form is good 

 above a basal buttress. 



The wood is slightly heavier than Lonpleaf Pine but most strength proper- 

 ties of Xello?: Sanders are intermediate to those of Longleaf Pine and 

 Douglas Fir. Shrinkage is exceedingly low, nearly comparable to that of 

 Teak, and the wood shoYxs good resistance to checking upon weathering. 

 Decay resistance is very high. Tests in Hawaiian v^raters indicate that the 

 YTOod lacks resistance to marine borers (U). 



Although present local use of Yellow Sanders is limited mainly to furni- 

 ture, the wood has much to recommend its use in boat construction, flooring, 

 and durable construction. 



2, Angelino Aceituno (Nec tandra concinna). This species is a medium-sized 

 timber-yielding tree native to Costa Rica, Colombia, and Venezuela. Little 

 specific information is known concerning its abundance or availability. 



The wood is comparable to Longleaf Pine in density anr^ strength. Shrinkage 

 is lovf and weathering characteristics good. Heartv/ood is rated as very 

 durable in resistance to decay organisms. Its moisture absorption is low, 

 comparable to Teak. These properties together with its local use in 

 tropical construction recomiiend Angelino Aceituno for durable construction 

 as well as for many uses in boat and ship construction. 



3, Andiroba ( Carapa guianensis). This species is found over a YJide range 

 from British Honduras and the 'Test Indies south through Brazil and Peru. 

 In view of this wide geographical distribution, it is suggested that the 

 data reported here should be limited to timber from the Amazon region, 

 the source of the test material. Trees ar ; straight and of good form, 

 commonly 2-3 feet in diameter and 80-100 feet in height. Buttresses are 

 low, leaving a clear bole length of ,^0 feet or more. Andiroba reaches its 

 best development and is most abundant in the Amazon flood plains, on 

 alluvial flats, and scattered along water courses. During a 6-month period, 

 12 per cent of the cut at a large savmiill on the Rio Tapajos is reported 



to have been Andiroba. 



Andiroba is comparable to Longleaf Pine in density and most strength prop- 

 erties. It compares viith Douglas Fir in compressive strength across the 

 grain. Shrinkage is slightly less than that of Longleaf Pine. Care is 

 required in seasoning Andiroba lumber to prevent checking and splitting, 

 and slow drying under cover is i-ecommended for best results in air season- 

 ing. After" it has been seasoned, however, the wood weathers well with 

 only minor checking. Heartwood is very durable vfith respect to decay. 



T - 6 



