GRAY PINE. 85 



TORREY PINE (Pinus torreyana). 

 PHYSICAL PROPERTIES. 



Weight of dry wood. 30.4 pounds per cubic foot (Sargent). 



Specific gravity. 0.49 (Sargent). 



Ash. 0.35 per cent weight of dry wood (Sargent). 



Fuel value. 68 per cent that of white oak (Sargent). 



Breaking strength (modulus of rupture). 10,600 pounds per square inch, or 

 66 per cent that of longleaf pine (Sargent). 



Factor of stiffness (modulus of elasticity). 803,000 pounds per square inch, 

 or 38 per cent that of longleaf pine (Sargent). 



Character and qualities. Wood, light, soft, moderately strong, very brittle, 

 compact; bands of small surninerwood broad, resinous, conspicuous; resin pas- 

 sages small, few; medullary rays numerous, obscure; color, light red, the 

 sapwood yellow or nearly white. 



Growth. Height, 18 to 30 feet ; diameter, 8 to 15 inches. 



SUPPLY AND USES. 



The range of the Torrey pine is restricted to a small portion of 

 San Diego County, Cal., and to the islands of Santa Cruz and Santa 

 Rosa. The species is rapidly disappearing, the small supply upon 

 the mainland having been drawn upon for fuel and for local use on 

 ranches until little remains. It is sometimes called the Soledad 

 pine " pine of solitude." Where it grows in the sweep of sea winds 

 its usual height is from 25 to 35 feet, with a diameter from 8 to 14- 

 inches, but in sheltered situations it forms a fairly straight trunk 

 from 40 to 60 feet or more high and is fit for small saw timber. It 

 is so scarce, however, that it is seldom cut. 



GRAY PINE (Pinus sabiniana). 

 PHYSICAL PROPERTIES. 



Weight of dry wood. 30.2 pounds per cubic foot (Sargent). 



Specific gravity. 0.48 (Sargent). 



Ash. 0.4 per cent weight of dry wood (Sargent). 



Fuel value. 65 per cent that of white oak (Sargent). 



Breaking strength (modulus of rupture). 10,800 pounds per square inch, 

 or 67 per cent that of longleaf pine (Sargent). 



Factor of stiffness (modulus of elasticity). 830,000 pounds per square inch, 

 or 39 per cent that of longleaf pine (Sargent). 



Character and qualities. Wood light, soft, rather strong, but brittle; annual 

 rings generally wide ; the wood of isolated trees is coarse and twisted grained, 

 the wood of closely grown timber is much finer and softer; summerwood 

 broad, very resinous, resin passages few, large, prominent; medullary rays 

 numerous, obscure ; not durable in contact with the soil. 



Growth. Height, 50 to 70 feet, but sometimes 100 or more; diameter, 18 

 to 30 inches, with occasional trees more than 3 feet. 



SUPPLY. 



This tree is generally called digger pine in the region where it 

 grows, but in literature it is known as gray pine, grayleaf pine, and 

 Sabine's pine. Its range is in the form of an elipse 500 miles long 



