Re: [PSUBS-MAILIST] Fluid Breathing - "The Abyss"

["Steven Mills" <barycenter@earthlink.net>]

>From: Fly Deep <flydeep4u@yahoo.com>
>
> Thank You for this Steve...DJB
> 

' Glad it was interesting and hopefully, useful!

I came across this searching another subject.
"the crush depth of an egg"   So far I came up
with zip, except for a lot of recipes for omelettes
and other egg dishes [ and some agriculture reports].

I was curious if there had been any experiments done
on subjecting an egg to extreme hydrostatic pressures.

Two things sparked my interest. One is an old parlor trick
where an egg is held in the palm of a person's hand and
then trying to squeeze it until it breaks. [ you can't be wearing
a ring or jewelry with blunt or sharp edges ].   If you haven't
tried it...try it...it's next to impossible.

The second was David Bushnell's "Turtle"  which really doesn't
look like a turtle especially if turned 90degrees laterally from the
ends it is "egg shaped".

What prompted Bushnell to design his sub in this shape? Was
he pondering an egg while eating breakfast?  Was he familiar
with that parlor trick [ and how old is that parlor trick? ]  :-)

The arch or dome shape is a geometric structure used throughout
history evident in Greek and Roman architecture and civil engineering
and the cathedrals in the Middle Ages.

I think geometry and structure figures in over thickness of the shell?
The shell of a nautilus is a few millimeters thick yet can withstand
tremendous pressures.  An egg shell is nearly a perfect ellipsoid
with no seams.

So...does anyone know the crush depth of an egg?

cheers, --Steve