This unit instructed readers how to find wild cork oaks, a particular concern in the US during the war, since the supplies of Spanish, Portuguese, and north African cork were uncertain. The unit includes:
- specimens with museum-style display cards
- halftone photos of a cork oak and its acorns
- a 4-page booklet containing 4 experiments
The unit shown here also includes a cork coaster not listed among the contents of the unit. Unusually, it was packaged in a light brown box (150x112x39 mm, twice as deep and slightly larger in the other dimensions than the standard blue box).
