Cross-section of his bell, showing how it is proposed that the diver could emerge wearing a smaller bell on his head, sufficient for a brief period of exploration. Date: 1690

- Image ID: G3BAG3
Cross-section of his bell, showing how it is proposed that the diver could emerge wearing a smaller bell on his head, sufficient for a brief period of exploration. Date: 1690
Chronicle / Alamy Stock Photo
Image ID: G3BAG3

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