diameter of the base. Two sets of inside forms were split longitudinally
and opened out, as shown in Fig. 2, and another small section was added
to complete the circle. The remaining set was left in place to support
the dome forms.

The dome forms were made in twelve sections, bolted together to
facilitate stripping. All ribs and segments were cut to size on the
ground, put together in place, and then covered with lagging and two-ply
tar paper. The lagging on the lower sharp curve was formed of a double
thickness of 3/8-in. spruce, the remainder being 1 by 4-in. pine, sized
to a uniform thickness of 7/8 in. Fig. 3 shows the construction of these
forms and the method of putting on the lagging.

The roof forms were made in eight sections and bolted together to
facilitate stripping. All ribs and segments were cut to size on the
ground, put together in place, and covered with 1 by 4-in. lagging,
dressed to a uniform thickness of 7/8 in., and two-ply tar paper. Fig. 3
shows the construction of these forms. The segments being put in
horizontally instead of square with the lagging, gave circles instead of
parabolas, making them much easier to lay out, and giving a form which
was amply stiff.

The question of using an inside scaffold only was carefully considered,
but owing to the considerable amount of ornamentation on the outside,
necessitating a large number of individual forms, it was not thought
that any economy would result.

Fig. 4 and Figs. 1 and 2, Plate XXIII, show clearly the construction of
the scaffolding.