Sylvis (1828–1869) was a pioneer American trade union leader.
Sylvis is best remembered as a founder of the Iron Molders' International Union and the National Labor Union, the latter being one of the first American union federations attempting to unite workers of various crafts into a single national organization.
Author: unknown photographer. From book edited by James C. Sylvis. Source: Frontis illustration from James C. Sylvis (ed.), The life, speeches, labors and essays of William H. Sylvis. (Philadelphia: 1872). License: PD US PD US expired