An Illustrated history & description Of Schools in the 18th & 19th Centurys.

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Later Geographies                      351
from the Schuylkill, and is then raised by steam 30 or 40 feet to a reservoir on the top of a circular edifice, from which it is distributed by bored logs to the different parts of the city.
Pittsburg is supplied with foreign goods chiefly by land from Philadelphia and Baltimore. The price of waggon carriage this distance is from 5 to 6 dollars a hundred pounds weight. The number of inhabitants, in 1810, was 4,768.
A decade later, when Pittsburg had a population of seven thousand, the geographies speak of it as " one of the greatest manufactur­ing towns in the Union."
I quote further from Adams, begin­ning with what he has to say of "the floating mills for grinding corn, which are frequently seen on the Ohio River."
The mill is sup­ported by two large canoes, with the wheel
between them; this is moored wherever they can find the strongest current, nearest to the shore, by the force of which alone the mill is put in operation. It is floated up and down the river whenever a customer calls.
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