Silhouettes - Glass negative photogrpah. Public domain.
Summary
Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description
Cutting portraits, generally in profile, from black card became popular in the mid-18th century, though the term silhouette was seldom used until the early decades of the 19th century, and the tradition has continued under this name into the 21st century.
Date
01/01/1919
Source
Library of Congress
Copyright info
No known restrictions on publication.