Name/Title
Platinum SearchEntry/Object ID
2026.69.1Description
Thomas Edison secretarially written and signed letter transmitting precious metal samples. 1p, 4.875" x 8";
Menlo Park, New Jersey; July 31, 1879. A letter to C.M. Juckett advising that the samples received did not
contain platinum. Edison hoped to secure platinum for use in developing his incandescent bulb.
He adds that he is sending a sample of the precious metal so "that you may know what platinum is." A small
card (2.125" x 3.5") containing smears of platinum and iridosmine (spelled "iridiosmine" on the card) is
included along with the original transmittal envelope. Both card and letter are stamped: "FROM THE
LABORATORY OF / T.A. EDISON. / MENLO PARK, N.J. / U.S.A." Letter has flattened folds and light
toning. Envelope has been torn open at the right, with loss affecting the recipient's address. Card retains sharp
edges, with light soiling to verso, and with great eye appeal. An important relic with direct association to
Edison's race to invent the incandescent light bulb.
