"Well," remarked Ned, when they came to a stop, "I don't
believe any one will find us here."
"Not an ordinary diver, at any rate," Tom agreed. "And after
supper I'm going to have another go at the currents."
The meal was served as usual, and a very good one it was,
considering the fact that not as many supplies could be carried
in the rather limited space of a submarine as may be transported
in an ocean liner. Then, as it was still early, Tom and Ned, with
the help of some of the officers, got ready for a new series of
experiments.
The big searchlight was set aglow, and, going out on the ocean
bed in diving suits, Tom and his friends dropped on the sand
various weighted objects.
These were made in the shape of the hull of a steamer, and in
proportion. Once they were on the sand, an iron rod was thrust
into the ocean bed near each object.
"Now," remarked Tom, as they all went into the submarine again,
"we'll let them drift until morning. Then we'll make new
calculations. I think we'll arrive at some results, too."
"Just what are you aiming to do?" asked Mr.
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