Compressed Air Work And Diving 1909
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MINIMUM AIR SU PPL Y.
9
Sometimes, however, if the symptoms are severe, it
may be necessary to send him to a greater depth for a
few minutes in order to relieve the pain and to cause
any bubbles which may have formed to go into solution
again more quickly than they would otherwise do.
TABLE III.
S bo wing Minimum Air Siipply required by Divers.
Depth. Pressure in Pounds per square inch due to Head of Salt Water. Cubic Feet of Free Air per Man per Minute.
Feet. Fathoms.
33 5^ 15 3-0
66 11 29 4-5
99 164 44 6-0
132 22 59 7-5
165 27j 74 9-0
198 33 88 10-5
231 384 103 12-0
In salt water at a depth of 1 foot pressure — 0'445 pound per square inch nearly.
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