But, in addition, I
have the universal periscope, the eye that sees all around, three
hundred and sixty degrees--a very clever application of an annular
prism with objectives, condenser, and two eyepieces of low and
high power."
A call from one of the crew took him into the stern to watch the
operation of something, leaving me to myself, for Kennedy was
roaming about on a still hunt for anything that might suggest
itself. The safety devices, probably more than any other single
thing, interested me, for I had read with peculiar fascination of
the great disasters to the Lutin, the Pluviose, the Farfardet, the
A8, the Foca, the Kambala, the Japanese No 6, the German U3, and
others.
Below us I knew there was a keel that could be dropped, lightening
the boat considerably. Also, there was the submarine bell,
immersed in a tank of water, with telephone receivers attached by
which one could "listen in," for example, before rising, say, from
sixty feet to twenty feet, and thus "hear" the hulls of other
ships.
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