The guard lock contains 21,775
perches of masonry, being equal to that of fifteen locks on the New York
Canals; and three others contain 12,300 perches. This canal is capable
of admitting steamboats of the largest class. It is scarcely two miles
in length; but, considering the quantity of mason work, and the
difficulty of excavating earth and rock from so great a depth, together
with the contingencies attending its construction, from the fluctuations
in the depth of the river, it is probably no over-statement when it is
said, that the work in it is equal to that of seventy or seventy-five
miles of an ordinary canal."
LETTER XIII.
NEW YORK--ASTOR LIBRARY.--COOPER INSTITUTE.--BIBLE HOUSE.--DR.
RAE--DR. TYNG.--TARRYTOWN.--ALBANY.--SLEIGHING--FINAL RETURN TO
BOSTON.--HALIFAX.--VOYAGE HOME.--CONCLUSION.
Albany, Nov. 27th, 1858.
My last letter was despatched to you on the 23rd inst.;--that evening we
dined at Mr. Aspinwall's. He has a handsome house in New York, and a
large picture gallery, and as we wished to see this by daylight, we
called on him after breakfast on the following morning, and had an
opportunity of examining the pictures, many of which are very good,
especially some by early Dutch masters.
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