SALVAGE EQUIPMENT USED IN RAISING SUBMARINE F-4. 19 
the medical officer who had conducted the physiological investigation in connection with the 
tank experiments, were available and were sent to Honolulu on this job together with the 
equipment which had been developed at the New York yard. 
From the success of the diving operations at Honolulu the bureau felt that the methods 
used were out of the experimental stage, and the equipment has accordingly been trans- 
ferred to the Torpedo Station, Newport, where other divers are now being trained for 
deep-sea work. 
THE PRESIDENT :—What was the record for deep-sea diving prior to this particular case? 
Nava Constructor Furer :—In connection with the research work conducted at the 
New York yard, two of the men went down to a depth of over 200 feet off New London. 
These dives were in the nature of tests to check up the experimental work which 
was being done at the New York yard. I believe that the record for actual deep-sea work 
_ was made off the Grand Canaries some years ago by a diver who was engaged in recovering 
the treasure from a Spanish galleon. This diver worked at a depth of 167 feet and recoy- 
ered about $200,000 worth of treasure. He finally broke down under the work and became 
completely paralyzed. No decompression methods were used, which no doubt accounts for 
the physical impairment of this man. 
Tue PRESIDENT :—The men in the case of the F-4 remained under water for 10 or 15 
minutes? 
Nava Constructor Furer:—When the vessel was lying in 300 feet of water, they 
were not intentionally kept on the bottom more than fifteen minutes. On one occasion a 
diver got foul of the life-line and air hose when at a depth of about 200 feet. A second 
diver had to be sent down to clear the line and hose. The first man had to remain at ap- 
proximately this depth for about two hours. He came up in very bad condition. His life 
was at first despaired of, as he contracted double pneumonia, which is one of the results of 
prolonged exposure under great pressure. He finally recovered, however. 
THE PresipeNT :—ls that man all right today? 
Nava Constructor FuRER:—Yes, he recovered entirely, and is, I believe, in normal 
health today. 
THE PresipENT :—Is there any other gentleman who wishes to discuss this paper? If 
not, I wish to congratulate Mr. Furer on the success of his enterprise which he has described 
so minutely and well in this paper, and I wish to extend to him the thanks of the Society 
for the care he has taken in the treatment and presentation of the subject, and in giving it 
to us for our records. 
We will now take up paper No. 3, entitled, “The Design of an Oil Engine,’ by Mr. 
John F. Wentworth, Member. 
Mr. Wentworth presented the paper. 
