Photos from the WFIWC Archives:
Facilities

(above) Log structure at Miami Field Base, Sierra N.F., Calif., 1939. The bark was left intact for rustic effect. To prevent insects and fungi from loosening the bark, John Patterson of the Berkeley FIL tested the effectiveness of copper sulphate & zinc chloride injected into freshly felled conifers.

(above 2 photos) The chemicals flowed by gravity from barrels into rubber collars enclosing the cut ends of felled trees. Limbs were left attached to allow transpiration and intake of the liquid. Most uniform results were obtained with trees 12 inches or less in diameter.

Patterson designed and built the structure aided by local labor.

Source: Patterson. 1940. Chemical injection of green trees for rustic construction materials. Progress report. Berkeley FIL.

(above) A bunkhouse was built with upright log walls at Hat Creek Field Base, Lassen N.F. about this time using the same methodology. It is shown as it appeared in 2001 with bark still in place. MMF photo.

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