The cost of a complete diving outfit ranges from $750 to $1,000. The weight of the armor and attachments worn by the diver is 246 pounds, divided as follows:—
Helmet and breastplate, 51 pounds; belt of lead weights, 122 pounds; rubber dress or suit, 19 pounds; iron soled shoes, 27 pounds each.
The greatest depth reached by any diver was 204 feet, at which depth there was a pressure of 88½ pounds per square inch on his body. The area exposed of the average diver in armor is 720 inches, which would have made the diver at that depth sustain a pressure of 66,960 pounds or over 33 tons.
The water pressure on the diver is as follows:—
| 20 | feet | 8½ | lbs. | |
| 30 | ″ | 12¾ | ″ | |
| 40 | ″ | 17¼ | ″ | |
| 50 | ″ | 21¾ | ″ | |
| 60 | ″ | 26¼ | ″ | |
| 70 | ″ | 30½ | ″ | |
| 80 | ″ | 34¾ | ″ | |
| 90 | ″ | 39 | ″ | |
| 100 | ″ | 43½ | ″ | |
| 110 | ″ | 47¾ | ″ | |
| 120 | ″ | 52¼ | ″ | |
| 130 | ″ | 56½ | ″ | |
| 140 | ″ | 60¾ | ″ | |
| 150 | ″ | 65¼ | ″ | |
| The limit | ||||
| 160 | feet | 69¾ | lbs. | |
| 170 | ″ | 74 | ″ | |
| 180 | ″ | 78 | ″ | |
| 190 | ″ | 82¼ | ″ | |
| 204 | ″ | 88½ | ″ |
THE FIRST DIVING HELMET MADE.
From a Photograph.