24 USES OF COMMEKCIAL WOODS OF THE UNITED STATES. 



Loblolly mine props are largely used in the mines of the South 

 and of Pennsylvania, and they are frequently given preservative 

 treatment. 



FUEL. 



Few pines, if any, exceed loblolly in the extent of their use as fuel. 

 Immense quantities are shipped as cordwood for domestic purposes 

 and find markets in towns in the loblolly region, and also in cities 

 as far north as Philadelphia. It has almost as wide a use for manu- 

 facturing purposes, particularly in brick burning, pottery kilns, and 

 by bakers who demand a quick, hot fire. 



CUBAN PINE (Pinus heterophylla). 

 PHYSICAL PROPERTIES. 



Weight of dry wood. 46.1 pounds per cubic foot. 



Specific gravity. 0.75. 



Ash. 0.26 per cent of weight of dry wood (Sargent). 



Fuel value. -Equal to white oak (Sargent). 



Breaking strength (modulus of rupture). 16,400 pounds per square inch, 

 or 102 per cent of that of longleaf pine (Sargent). 



Factor of stiffness (modulus of elasticity). 2,243,000 pounds per square inch, 

 or 106 per cent that of longleaf pine (Sargent). 



Character and qualities. Very heavy, hard, strong, and tough; grain fine 

 and straight; compact, annual rings wide, summerwood very broad, occupying 

 fully half width of the annual growth; very resinous, conspicuous resin pas- 

 sages numerous, large ; medullary rays numerous, rather prominent ; color, rich 

 dark orange, the sapwood lighter, often nearly white; durable. 



Growth. Height, 75 to 100 feet; diameter, 1^ to 3 feet. 



SUPPLY. 



The commercial range of Cuban pine lies in Alabama^ Florida, 

 Georgia, Louisiana, and South Carolina; and among the names by 

 which it is known are slash pine, swamp pine, bastard pine, meadow 

 pine, pitch pine, she pitch pine, she pine, and spruce pine. 



The Cuban pine made a late entrance into the lumber supply of 

 this country. Long after nearly all other trees that are associated 

 with it were well known, this tree had no botanical name, and those 

 who made use of the wood generally supposed they were using lob- 

 lolly pine or longleaf pine. It bears some resemblance to both, but 

 the foliage would scarcely be mistaken for longleaf. It was finally 

 distinguished as a separate species, and upon better acquaintance it 

 was found to possess many properties which give it value at present 

 and promise it a place in this country's future timber supply. It does 

 not exist in large quantity, compared with some of the other pines. 

 Its range is limited to the coast of South Carolina, Georgia, Florida, 

 and along the Gulf to Texas. It is the only pine in southern Florida, 



