http://swissbaync5d7ykaz7dh7v4qjrb4gmen5aj3bogxrcgbb43ij34bjuyd.onion/pdf/Books/Survival/Medicine/oddsnends.htm
"That is a diving apparatus," said I. Just so, but under these conditions the man is not at liberty; he is attached to the
pump which sends him air through an india-rubber tube, and if we were obliged to be thus
held to the Nautilus, we couldn not go far."