The things we do!

62 tons.
Do you follow all this?"
"I do."
"Then, when the Nautilus is afloat under these circumstances,
one-tenth is out of the water. Now, if I have made reservoirs
of a size equal to this tenth, or capable of holding 150 tons,
and if I fill them with water, the boat, weighing then 1,507 tons,
will be completely immersed. That would happen, Professor.
These reservoirs are in the lower part of the Nautilus.
I turn on taps and they fill, and the vessel sinks that had just
been level with the surface."
"Well, Captain, but now we come to the real difficulty.
I can understand your rising to the surface; but, diving below
the surface, does not your submarine contrivance encounter a pressure,
and consequently undergo an upward thrust of one atmosphere
for every thirty feet of water, just about fifteen pounds
per square inch?"
"Just so, sir."
"Then, unless you quite fill the Nautilus, I do not see how you
can draw it down to those depths."
"Professor, you must not confound statics with dynamics or you will be
exposed to grave errors.


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