Brad Stambaugh wrote:

> >I was taught that, technically, nitrox is a reduced oxygen gas, i.e.
> >less than the 21% found in air.
> ...snip
>
> Ok, but what was this original recipe diluted with? It would seem that
> it was diluted with nitrogen, from what you ol' timers have said. Is
> that so?!

 I haven't a clue.  This was simply a response to the suggested origin of
EAN .  For all I know, the original nitrox may have been intended for
something other than breathing . . . or not.

Lee