Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 422
plated. Mr. Ward in his late designs made stops o o (Fig.972) to prevent this. Other engineers have re-enforced the ball by a hoop, ofwhich Fig. 973 is an example, from the Transactions A. S. C. E., designedby James C. Duane, C. E., and laid beneath the East Eiver from New Yorkcity to Wards Island.… … note: a band seat to be turnedtruly cylindrical andband securely shrunk on b corners to be roundedoff as shown , Fig. 973.
Mechanical drawing
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