The head and body of the suit are of cast metal riveted. The arms and legs, however, are of can- vas reenforced by coils of strong metal tubing. Flexibility is thus given them while their ability to protect the limbs from being crushed by the enormous pressure of the wa- ter is not impaired
��The heavily laden divers are lowered by single steel cables which enclose the telephone wires through which the orders are trans- mitted. Oxygen apparatus is at- tached to each suit. In this enough oxy- gen is stored to last for eight hours. The weight of the suit is an advantage
���•--.
��Salvaging in Armor
/%S a diver goes down, the water pressure in- J-\ creases at the enormous rate of over three tons a square foot for every one hundred feet. This water pressure is overcome by supply- ing the diver's lungs with air of an equal pressure. Evidently, the air pressure has to be increased the farther down the diver goes; but if at any time this pressure becomes either more or less than the
water outside, the diver will be injured or even
killed.
This danger is entirely done away with by the armored diving suit invented by B. F. Levitt, of Toledo, Ohio. His suit entirely separates and protects the diver from the water. Manganese
93
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