more than 1 cwt. 2 qrs. An overflow was provided, immediately above
the hatchway, by a grating 15in. wide that was doubtless of bronze
also, but it had been removed, the stud-holes in the stones alone
remaining.[16] The extreme surface of the water measured 82ft. 10in.
by 40ft. 11in. and was a parallelogram, except that the north-western
angle was cut off by the steps being carried obliquely in three tiers
from the bottom a length of 7ft. at an angle of 39° with the western
end. Resting on the platform, formed by these three steps, is a
quarter circle pedestal,[17] on which stands a large stone 6ft. 8in.
long and 9in. thick, over-hanging its base, and presenting a concave
line towards the bath with an _ovolo_ section in its thickness. This
stone spans a large channel 2ft. 3in. wide, within which is fitted a
very thick lead pipe, gradually narrowed _horizontally_ and turned
up under the _ovolo_ concave stone. Through this aperture the mineral
water was thrown into the bath in a sort of spray, so that it might be
cooled in its passage. A deposit from the water is incrusted over the
stone and pipe several inches in thickness, until the petrification
entirely stopped the flow of water, which was then compelled to flow
_over_ instead of under the stone.[18] The water was conducted a
distance of 38ft. in the thickness of the lower pavement (which I
shall presently describe) of the _Schola_, the stone being removed a
width of 2ft., the bed being concreted. On this was laid a lead pipe
which filled the whole orifice, but, unfortunately, a length of 25ft.
of it has been removed. This conduit takes a diagonal direction, and
leads direct to the north-west angle of the hall, turning beneath a
large doorway in the western wall, when it again resumes its original
direction (the pipe, where perfect, is 1ft. 9in. by 7in. deep), as far
as the outer surface of the wall of the octagon well. At this point
the wall of the well is not original work, and the pipe is cut off.
I have no doubt that it was at one time carried up vertically until