Classicly

The practical utility of some parts of the system is so obvious, that they have been acted upon in various places, without any desire of further improvement. It is uncommon now, to meet with roads repaired with large stones, or of the dangerous convex form, which was the universal custom about five years ago; but these improvements being merely grafted on the old erroneous method, have never been attended with the rapid diminution of expense, and the durable advantages which immediately result from the adoption of the entire system as recommended by me.