152 



FOREST UTILIZATION INDUSTRIAL FORESTRY 



timber marked to be cut or $0.054 per m.b.f. of the total stand. There 

 were 21 million b.f., log scale, or 7000 feet per acre, on the tract. 

 Trees for cutting were marked with white paint on four sides. 



5. MANUFACTURING AND CONDITIONING 



The manufacture of lumber is probably the oldest, most typical, 

 and one of the largest American industries. For many generations 

 it has supplied building materials for our homes, as well as many 



FIG. 87. Typical large size band sawmill cutting hardwoods near Kingsport, 

 Tennessee. On the right is the logging railroad used to haul logs from the 

 woods. The log dump and railway are also shown on the right. Hardwood 

 mills seldom use log storage ponds as shown in this picture. An overhead 

 cable-way is used to convey the logs to the jack ladder which hoists them to 

 the upper floor of the sawmill. In the foreground are logs delivered by motor 



truck. 



other products that come into intimate relationship with our daily 

 lives. During the rapid expansion in population in the last century 

 there was an enormous development in lumber manufacture. This 

 continued until the peak of production in 1907, when 46 billion b.f. 

 were produced in about 40,000 sawmills. After 1929, there was a 

 rapid recession in production to about 10% billion b.f. in 1932, and 

 a small gradual increase since. 



