URL: https://digitalcollections.hoover.org/objects/40691 Collection Structure Poster collection > ... Be careful with blasting caps! Misplaced caps cause damage to office building. ... [Verso:] Wilyum Jan says. ... Item Title ... Be careful with blasting caps! Misplaced caps cause damage to office building. ... [Verso:] Wilyum Jan says. ... Collection Title Poster collection Artist Chapin Issuing Body Hercules Powder Company Date Created 1938/1939? Description Drawing of an explosion in an office. Double-sided. Subject(s) World War, 1939-1945 Safety education, Industrial Priorities, Industrial Explosives industry United States Accidents Industrial safety Prevention Economic aspects Explosions Explosives Industrial accidents Manpower Military aspects Safety measures Language(s) English Country of Origin United States Country of Origin United States Place Published Wilmington, Delaware, United States Dimensions Overall: 22 x 16 in. (55.9 x 40.6 cm) Format Poster Medium political posters Color color Color color Hoover ID Poster US 6860 Record Number XX343.31067 Collection Guide https://oac.cdlib.org/findaid/ark:/13030/kt829015km Rights This work may be protected by copyright laws and is provided for educational and research purposes only. Any infringing use may be subject to disciplinary action and/or civil or criminal liability as provided by law. If you believe you are the rights holder and object to Hoover's use of this work, please contact the Hoover Institution Library & Archives.