King, Charles A. (Charles Albert), b. 1865 · New York, Cincinnati [etc.] American book compay · leaf 32
Fig. 10. — Boom of Logs. LUMBERING AND VARIETIES OF WOOD 17 transportation is employed, the logs are generally piledupon another skidway until there is enough for a trainload, or until the conditions upon the river are favorablefor them to be floated to the mill. (F.) Figure 11 illustrates a jam_… … face. A jam usually depends upon one key log, which,if loosened, will allow the jam to break instantly. Thework of loosening the key log is frequently done by oneor two men, who must be men of spring steel nerves andmuscles, and possessed of the highest possible skill andactivity, or they cannot…
Woodwork (Manual training)
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