The submarine hydrostat, as it is called, is one of the most ingenious and recent applications of the diving-bell principle.
The “aquatic kettle” was doubtless the embryo of the diving-bell.
They willingly agreed to descend in the diving-bell, and Brown and another man also went down in it.
The diving-bell is used mostly for laying submarine masonry.
The upper chamber of the diving-bell is very strong and air-tight, without any openings for the admission of water.
The diving-bell was not mentioned before the sixteenth century.
Signor Marchi, a Roman, in 1535 descended in a diving-bell and explored this curious palace, which had sunk beneath the waters.
As to the diving-bell advantage, I speak feelingly, as I have assisted over a twenty-mile course in one myself.
For hundreds of years men have used a contrivance called a diving-bell for working under water.
The owners of the diving-bell are determined to make the effort to raise her and secure for themselves the immense reward offered.