The two diver images were shot in the Bahamas in 1970 and scanned on 22 July 1998 with the worst of the fungus touched up.  The remainder were taken on 22 July 1998 with a Sony VX 1000 Digital Video camera using photo mode.  The Electrolung pictured was a Beckman model which I carried on my boat as a spare for 20 years.  It hasn't been used since 1971.  I dug it out of the garage and blasted the dust off with a high pressure water jet to take the pictures.  Sorry if it is a bit untidy but 20 years aboard ship and 10 more in a garage in the wet tropics does that to things.