5 ms·

The description of de Gamond's diving work is particularly amazing. I had no idea such a thing was possible.

OJFord 3y ago
I just popped back to say the same, absolutely extraordinary. > After exhausting all terrestrial research methods, Thomé de Gamond set out to solve the mystery of the strait via three extraordinary solo dives in 1855. Weighed down by 160 pounds of flint, he stoppered his ears with home-made plugs of lard, and turned his mouth into a de facto valve, using olive oil to expel air without taking in water. Thus equipped, he successfully descended over one hundred feet to collect soil samples from the seabed, ascending afterward with the help of ten inflated pig bladders.
- synarchefriend 3y ago
  Another description: https://www.gutenberg.org/files/66685/66685-h/66685-h.htm https://www.gutenberg.org/files/66685/66685-h/66685-h.htm Geological conditions existing in the middle of the Strait were, up to that time, almost entirely a matter of surmise, based on observations made on the British and French sides of the Channel, and in the process of finding out more about them, [18]Thomé de Gamond decided to descend in person to the bottom of the Channel to collect geological specimens. In 1855, at the age of forty-eight, he had the hardihood to make a number of such descents, unencumbered by diving equipment, in the middle of the Strait. Naked except for wrappings that he wound about his head to keep in place pads of buttered lint he had plastered over his ears, to protect them from high water pressure, he would plunge to the bottom of the Channel, weighted down by bags of flints and trailing a long safety line attached to his body, and a red distress line attached to his left arm, from a rowboat occupied also by a Channel pilot, a young assistant, and his own daughter, who went along to keep watch over him. On the deepest of these descents, at a point off Folkestone, Thomé de Gamond, having put a spoonful of olive oil into his mouth as a lubricant that would allow him to expel air from his lungs without permitting water at high pressure to force its way in, dived down weighted by four bags of flints weighing a total of 180 pounds. About his waist he wore a belt of ten inflated pig's bladders, which were to pull him rapidly to the surface after he had scooped up his geological specimen from the Channel bed and released his ballast, and, using this system, he actually touched bottom at a depth of between 99 and 108 feet. His ascent from this particular dive was not unremarkable, either; in an account of it, he wrote that just after he had left the bottom of the Channel with a sample of clay ... I was attacked by voracious fish, which seized me by the legs and arms. One of them bit me on the chin, and would at the same time have attacked my throat if it had not been preserved by a thick handkerchief.... I was fortunate enough not to open my mouth, and I reappeared on top of the water after being immersed [19]fifty-two seconds. My men saw one of the monsters which had assailed me, and which did not leave me until I had reached the surface. They were conger eels.
  - synarchefriend 3y ago
    Here is a modern account of a conger eel attack (with a graphic photo). Seems they are quite vicious. https://m.independent.ie/irish-news/diver-felt-like-a-rag-doll-in-frenzied-conger-eel-attack/29416991.html https://m.independent.ie/irish-news/diver-felt-like-a-rag-do...
- empath-nirvana 3y ago
  Wouldn't have been easier to just dredge from a boat? Surely they had 100 foot long ropes?

I just popped back to say the same, absolutely extraordinary. > After exhausting all terrestrial research methods, Thomé de Gamond set out to solve the mystery of the strait via three extraordinary solo dives in 1855. Weighed down by 160 pounds of flint, he stoppered his ears with home-made plugs of lard, and turned his mouth into a de facto valve, using olive oil to expel air without taking in water. Thus equipped, he successfully descended over one hundred feet to collect soil samples from the seabed, ascending afterward with the help of ten inflated pig bladders.

synarchefriend 3y ago
Another description: https://www.gutenberg.org/files/66685/66685-h/66685-h.htm https://www.gutenberg.org/files/66685/66685-h/66685-h.htm Geological conditions existing in the middle of the Strait were, up to that time, almost entirely a matter of surmise, based on observations made on the British and French sides of the Channel, and in the process of finding out more about them, [18]Thomé de Gamond decided to descend in person to the bottom of the Channel to collect geological specimens. In 1855, at the age of forty-eight, he had the hardihood to make a number of such descents, unencumbered by diving equipment, in the middle of the Strait. Naked except for wrappings that he wound about his head to keep in place pads of buttered lint he had plastered over his ears, to protect them from high water pressure, he would plunge to the bottom of the Channel, weighted down by bags of flints and trailing a long safety line attached to his body, and a red distress line attached to his left arm, from a rowboat occupied also by a Channel pilot, a young assistant, and his own daughter, who went along to keep watch over him. On the deepest of these descents, at a point off Folkestone, Thomé de Gamond, having put a spoonful of olive oil into his mouth as a lubricant that would allow him to expel air from his lungs without permitting water at high pressure to force its way in, dived down weighted by four bags of flints weighing a total of 180 pounds. About his waist he wore a belt of ten inflated pig's bladders, which were to pull him rapidly to the surface after he had scooped up his geological specimen from the Channel bed and released his ballast, and, using this system, he actually touched bottom at a depth of between 99 and 108 feet. His ascent from this particular dive was not unremarkable, either; in an account of it, he wrote that just after he had left the bottom of the Channel with a sample of clay ... I was attacked by voracious fish, which seized me by the legs and arms. One of them bit me on the chin, and would at the same time have attacked my throat if it had not been preserved by a thick handkerchief.... I was fortunate enough not to open my mouth, and I reappeared on top of the water after being immersed [19]fifty-two seconds. My men saw one of the monsters which had assailed me, and which did not leave me until I had reached the surface. They were conger eels.
- synarchefriend 3y ago
  Here is a modern account of a conger eel attack (with a graphic photo). Seems they are quite vicious. https://m.independent.ie/irish-news/diver-felt-like-a-rag-doll-in-frenzied-conger-eel-attack/29416991.html https://m.independent.ie/irish-news/diver-felt-like-a-rag-do...
empath-nirvana 3y ago
Wouldn't have been easier to just dredge from a boat? Surely they had 100 foot long ropes?