Image: Trimming platinum wires at Hercules Port Ewen plant 2012 017 b2f37 gb19f642hf

Description: General view of employee Bertha Warren using embroidery scissors to trim platinum wires used in the electric blasting caps manufactured at the Hercules Powder Company plant in Port Ewen, New York. Formed in 1912 as part of an anti-trust settlement with DuPont, the Hercules Powder Company (later Hercules Inc.) specialized in the manufacture of explosives and smokeless powders. The company's Port Ewen plant produced a range of special detonators designed for military use, as well as construction jobs that required blasts of dynamite, such as the clearing of quarries, mines, and tunnels. Published without a copyright notice in the March 1955 edition of the Hercules Mixer.
Title: Trimming platinum wires at Hercules Port Ewen plant
Credit: https://digital.sciencehistory.org/works/zw12z5752
Author: Hercules Incorporated
Permission: This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No