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 of eight feet lift each, at 2,200,000 dollars, a little more than 13,000 dollars a mile. Fortunately, however, we have more accurate information than mere estimates.

In the appendix to Mr Gallatin's report, it is stated by Mr Joshua Gilpin, that "by actual measurement, and the sums paid on the feeder, it was found that one mile on the Delaware and Chesapeake canal, the most difficult of all others, from its being nearly altogether formed through hard rocky ground, cost 13,000 dollars, and one other mile perfectly level, and without particular impediments, cost 2,300 dollars; from hence, the general average would be reduced to 7,650 dollars per mile."

The Middlesex canal, in Massachusetts,