Public domain
Dr. H.C. Hayes of U.S. Naval Research Lab., Bellevue, D.C., 6/29/25
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Subjects
Credit lineDr. H.C. Hayes of U.S. Naval Research Lab., Bellevue, D.C., 6/29/25. 1925-01-01. National Photo Company Collection, Library of Congress. Public domain.
