X-ray
Geissler
Crookes
Radio
Box art
Dr. Hugh Hicks
S.Slabyhoudek
M-Jay
Fort Myers, FL.
Monsieur Ara
Fin Stewart
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Early Edison lamp. Caption card (partially shown) reads: “1881: Plaster replaced wood as the base insulator. To reduce lamp costs, filaments were now universally copper-plated to the lead wires. The envelopes of the round bulbs were free-blown. Those of the elongated ones were blown into a mold.” |
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