Autograph endorsement signed by Thomas A. Edison

EDISON, Thomas A. (1847-1931). Autograph endorsement signed (“Thos. A. Edison”), May 10, 1930. On April 30, 1930 typed memorandum from G. E. Stringfellow to Edison. two pages, matted. Edison’s endorsement and signature in pencil.

Edison approves a cost-saving change in his lab. Stringfellow’s memo makes the case for discontinuing the use of quarter-inch tubes in their “tamp nickel hydrate loading machines.” A longer tube was available. “Certainly we have received nothing from the short tube results that were not available from the long tubes,” and using only the long tubes “will permit a labor saving of $1400.00 a year.” Edison accepts the proposal and writes: “I approve dropping of short tube.”