Am Stellwerk, das bereit war, Gasalarm auszulösen; Das schnelle und präzise Auslösen des Gasalarms, wenn Gas entdeckt wurde, bedeutete, das Leben vieler Männer zu retten.

Picryl description: Public domain image from the Schomburg Center for Research in Black Culture in Harlem, free to use, no copyright restrictions image. The Schomburg Center for Research in Black Culture in Harlem is one of The New York Public Library’s research libraries devoted to the research, preservation, and exhibition of materials focused on African American, and African experiences.