the one actually erected; third, a typical reinforced concrete
structure.

Considering only that portion below the tank, the amount of material
required to case in a structure of the first type would be substantially
the same as that used to support the tank in a structure of the second
type. Consequently, the steel substructure, for all practical purposes,
would represent a dead loss, and, therefore, the economy of this type is
open to serious question.

A tender was received for a reinforced concrete structure identical in
outward appearance with the one built, but, owing to the natural
conservatism of the local residents regarding this type of construction,
it was not acceptable.

The tower, as built, consists of a hollow cylinder of plain concrete,
109 ft. high, and having an inside diameter of 22 ft. The walls are 10
in. thick for the first 70 ft. and 6 in. thick for the remaining 39 ft.,
and are ornamented with six pilasters (70 ft. high, 3 ft. wide, and 7
in. thick), a 4-ft. belt, then twelve pilasters (12 ft. high, 18 in.
wide, and 7 in. thick), a cornice, and a parapet wall.

A steel tank of the ordinary type is embedded in the upper 40 ft. of
this cylinder. To form the bottom of this tank, a plain concrete dome is
thrown across the cylinder at a point about 70 ft. from the base, the
thrust of this dome being taken up by two steel rings, 1/2 in. by 14 in.
and 3/8 in. by 18 in., bedded into the walls of the tower, the latter
ring being riveted to the lower course of the tank.

The tank is covered with a roof of reinforced concrete, 4 in. thick,