Line, to enable them more correctly to estimate the greatness of the undertaking.
The reader who has accompanied us in our journey will, perhaps, scarcely be aware that he has passed one hundred excavations and embankments—yet such is the fact. In the formation of these, five millions five hundred thousand cubic yards of earth and stone have been cut and removed, three millions of which have been employed in the embankments; the remainder has, for the most part, been laid out for spoil, as described at page 26. In the Line, there are about one hundred and nine thousand distinct rails, which rest on four hundred and thirty-six thousand chairs, which are supported by four hundred and thirty-six thousand blocks of stone. The Railway passes under one hundred bridges, two aqueducts, and through two tunnels; it passes over fifty bridges and five viaducts, the latter are stupendous erections. In the formation of the line upwards of forty-one million four hundred and forty thousand pounds of iron have been used for rails and chairs, and upwards of six hundred and fifty-six thousand nine hundred and forty cubic yards of stone for
