The commissioners appointed to examine into the methods
proposed for preventing the forgery of bank-notes, state in their
report, that out of one hundred and seventy-eight projects
communicated to the bank and to the commissioners, there were
only twelve of superior skill, and nine which it was necessary
more particularly to examine.
319. It is however a curious circumstance, that although the
power of combining machinery is so common, yet the more beautiful
combinations are exceedingly rare. Those which command our
admiration equally by the perfection of their effects and the
simplicity of their means, are found only amongst the happiest
productions of genius.
To produce movements even of a complicated kind is not
difficult. There exist a great multitude of known contrivances
for all the more usual purposes, and if the exertion of moderate
power is the end of the mechanism to be contrived, it is possible
to construct the whole machine upon paper, and to judge of the
proper strength to be given to each part as well as to the
framework which supports it, and also of its ultimate effect,
long before a single part of it has been executed.
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