This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
USS Alligator . The Alligator was the first submarine purchased by the Navy It contained two crude air purifiers chemical based system for producing oxygen and bellows to force air through lime Text photo courtesy of chinfo navy mil navsource org htm PDUSGovMilNavy original upload log page en USSAlligator Malo bytes no Alligator