SPECIES OF WOODS. 



99 



Physical Qualities: Light (65th in 

 this list); 18 Ibs. per cu. ft; sp. gr., 

 0.2882; weak (63d in this list); brit- 

 tle (62d in this list) ; very soft (61st 

 in this list); shrinks little; warps lit- 

 tle; remarkably durable; easy to work, 

 splits readily, takes nails well. 



Common Uses: Construction, lum- 

 ber, coffins, shingles. 



Remarks: Dimensions and age are 

 unequalled; Big Tree and Redwood 

 survivors of a prehistoric genus, once 

 widely distributed. Some specimens 

 3600 years old. 



Radial b^ction, 

 life size. 



Cross-section, 

 magnified 37 H diameters. 



Tangential Section, 

 life size. 



