2 15.7 15.5 52.5
Thus, in three periods of ten years, during each of which the
general population of the country has increased about 15 per
cent, or about 52 per cent upon the whole period of thirty years,
the population of these towns has, on the average, increased 132
per cent. After this statement, there requires no further
argument to demonstrate the vast importance to the well-being of
this country, of making the interests of its manufacturers well
understood and attended to.
4. The advantages which are derived from machinery and
manufactures seem to arise principally from three sources: The
addition which they make to human power. The economy they produce
of human time. The conversion of substances apparently common and
worthless into valuable products.
5. Of additions to human power. With respect to the first of
these causes, the forces derived from wind, from water, and from
steam, present themselves to the mind of every one; these are, in
fact, additions to human power, and will be considered in a
future page: there are, however, other sources of its increase,
by which the animal force of the individual is itself made to act
with far greater than its unassisted power; and to these we shall
at present confine our observations.
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