Ocean Junkies on Twitter: "The first mechanical aid to diving is the "Diving Bell" developed in the 16th century by Guglielmo de Lorena #OJDC https://t.co/ZMFA6GUAGm" / Twitter
From Reeds To Regulators: The History Of Scuba • Scuba Diver Life
Diving bell - Wikipedia
World's First Commercial Diving Bell | The Purisima was buil… | Flickr
What's a diving bell? | HowStuffWorks
How diving bell is made - making, history, used, industry, machine, History, Raw Materials, Design