Quentin.
[Illustration: FIG. 1--ELEVATION.]
This chimney, which is cylindrical in form, is 140 feet in height, and
has an internal diameter of 81/2 feet from base to summit. The coal
consumed for the nine generators varies between 860 and 1,200 pounds
per hour and per 10 square feet of section.
The ground that was to support this chimney consisted of very
aquiferous, cracked beds of marl, disintegrated by infiltrations of
water from the distillery, and alternating with strata of clay. It
became necessary, therefore, to build as light a chimney as possible.
The problem was solved as follows, by Mr. Guendt, who was then
superintendent of the Rocourt establishment.
Upon a wide concrete foundation a pedestal was built, in which were
united the various smoke conduits, and upon this pedestal were erected
four lattice girders, C, connected with each other by St. Andrew's
crosses. The internal surface of these girders is vertical and the
external is inclined. Within the framework there was built a five-inch
thick masonry wall of bricks, made especially for the purpose. The
masonry was then strengthened and its contact with the girders assured
by numerous hoops, especially at the lower part; some of them
internal, others external, to the surface of the girders, and others
of angle irons, all in four parts.
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