For experiments in phototropism. A stout cardboard black lined box with aperture tube and end cap. Overall size 200 x 160 x 130 mm, side tube 110 x 50 mm dia.
For experiments in phototropism. A stout cardboard black lined box with aperture tube and end cap. Overall size 200 x 160 x 130 mm, side tube 110 x 50 mm dia.
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For experiments in phototropism. A stout cardboard black lined box with aperture tube and end cap. Overall size 200 x 160 x 130 mm, side tube 110 x 50 mm dia.