tree of knowledge ltd (1 Ergebnisse)

1st English edition stated. 119pp, (8.5x11 inches), b&w photos and diagrams. VG in wrappers (softcover). Covers lightly worn and soiled, corners creased. Contents clean and tight, no markings, page corners show some wear. Appears to be a manual designed to accompany a "kit" of experiments. Many of the experiments use items from the kit. From the most basic experiments with household items through silicone solar cells, a transistor radio, a perpetual motion pendulum.