With regard to Mr. Gumpel's remark on the
friction of the propeller, he would say that it was constructed to run
900 revolutions; if it were driven by a steam engine, and the speed
reduced to 300, not only would the pitch have to be altered, but the
surface would have to be larger, which would entail more friction. Mr.
Crohne would bear him out that they lost only 5 per cent. by slip and
friction combined, on an average of a great number of trials, both with
and against the current.
The Chairman in proposing a vote of thanks to Mr. Reckenzaun, said he
rejoiced to find that that gentleman had proved, to one man at least,
that his views had been mistaken. He found in these days of the
practical applications of electricity, that the ideas of most practical
men were gradually being proved to be mistaken, and every day new facts
were being discovered, which led them to imagine that as yet they were
only on the shore of an enormous ocean of knowledge. It was quite
impossible to say what these electric launches would lead to.
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