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Details
Four Geissler tubes,
including a vase and spiral tube, a liquid-filled tube, two others, a Crookes' tube, the pear-shaped bulb with bee and rose, and a neon tube (defective), by Osram, the vase and spiral tube -- 10in. (27.3cm.) long
See Illustration
including a vase and spiral tube, a liquid-filled tube, two others, a Crookes' tube, the pear-shaped bulb with bee and rose, and a neon tube (defective), by Osram, the vase and spiral tube -- 10in. (27.3cm.) long
See Illustration