Bildnachweise: Taucherglockenschiff: "CarlStraat Kƶln" by Photo by CEphoto, Uwe Aranas / CC-BY-SA-3.0. Licensed under CC BY-SA 3.0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:CarlStraat_K%C3%B6ln.jpg#/media/File:CarlStraat_K%C3%B6ln.jpg Offene Taucherglocke: "Taucherglocke von Eugen von Ransonnet-Villez, Naturhistorisches Museum Wien" by Sandstein - Own work. Licensed under CC BY 3.0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Taucherglocke_von_Eugen_von_Ransonnet-Villez,_Naturhistorisches_Museum_Wien.jpg#/media/File:Taucherglocke_von_Eugen_von_Ransonnet-Villez,_Naturhistorisches_Museum_Wien.jpg
Bildnachweise: Taucherglockenschiff:"CarlStraat Kƶln" by Photo by CEphoto, Uwe Aranas / CC-BY-SA-3.0. Licensed under CC BY-SA 3.0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:CarlStraat_K%C3%B6ln.jpg#/media/File:CarlStraat_K%C3%B6ln.jpg Offene Taucherglocke:"Taucherglocke von Eugen von Ransonnet-Villez, Naturhistorisches Museum Wien" by Sandstein - Own work. Licensed under CC BY 3.0 via Wikimedia Commons - https://commons.wikimedia.org/wiki/File:Taucherglocke_von_Eugen_von_Ransonnet-Villez,_Naturhistorisches_Museum_Wien.jpg#/media/File:Taucherglocke_von_Eugen_von_Ransonnet-Villez,_Naturhistorisches_Museum_Wien.jpg