Image shows a valved die casting and smoke box filter assembled with a mask. It is part of the Mechanical Research conducted by Clark in the Research Division of the Chemical Warfare Service during World War One. Photographer number is 54681, Au Reco on July 12, 1918, taken at 1088.

---

Size: 8441px × 5741px
Photo credit: © piemags/NSC / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: .., activities, advancements, aerial, agents, american, assembly, attack, box, casting, chemical, clark, contamination, deadly, defense, development, die, division, engineering, equipment, experiments, filter, gas, gases, gear, innovation, inventions, manufacturing, mask, measures, mechanical, military, photography, protection, protective, research, revolutionary, safety, scientific, service, smoke, strategies, substances, technological, technology, toxic, valved, war, warfare, wartime, weapon, weapons, world, zone