Diving Bells and Suits 



391 



pump placed on the bank or on the deck of the boat furnishes him 

 compressed air which escapes through orifices contrived for this 

 purpose. The pressure to which the air breathed by the diver is 



Fig. 7 — Diver equipped with the Denayrouze regulator, complete suit. 



subjected is therefore practically equal to that which the water 

 exerts on the rest of his body. This condition absolutely must be 

 met, as we shall see in the following part of this work, and very 



