URL: https://digitalcollections.hoover.org/objects/40695 Collection Structure Poster collection > ... Lightning is treacherous! Take no chances with a thunderstorm ... [Verso:] Wilyum Jan says ... Item Title ... Lightning is treacherous! Take no chances with a thunderstorm ... [Verso:] Wilyum Jan says ... Collection Title Poster collection Artist Chapin Issuing Body Hercules Powder Company Date Created 1938/1939? Description Drawing of an accidental explosion at a rock quarry. Double-sided. Subject(s) Lightning World War, 1939-1945 Industrial safety Industrial accidents United States Explosives industry Military aspects Safety education, Industrial Explosions Quarries and quarrying Priorities, Industrial Explosives Economic 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 6864 Record Number XX343.31071 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.