. The sea [microform] : its stirring story of adventure, peril & heroism. Adventure and adventurers; Voyages and travels; Ocean; Aventures et aventuriers; Voyages; Océan. a signal gun. Each boat's crew consists of twenty hands and a negro. The rowers are ten in number. The divers divide themselves into two groups of five men each, who labour and rest altrrnately ; they descend from forty to tifty feet, seventy being about the utmost they can accomplish, and eighty seconds the longest period the best diver can remain under water, the ordinary period being only thirty seconds. In order to ac
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