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THE LOWER STOA

135

shown in detail on Plate XXIX., W. The Roman floor-level was about 0.5G m. above
that of the Greek. On the plan in Plate XXVIII. the four irregular circles are indica-
tions of what appear to be cisterns, which were in depth from 1.50 to 3 m.

The principal interest in the building' centres in the hypocaust or hollow floor and

Fig. C9. — Argive Heraeum : Roman Building (IX): plan and elevation restored.

wall construction, through which warmed air circulated as in other Roman buildings,
notably the baths at Pompeii. On Plate XXIX., A and G, are shown the actual plan
and a restored section. The floors were first covered with flat tiles about 0.60 m. square,
upon which were built piers about 0.70 m. high of smaller square or round tile and in
one case of stone. On these piers large tiles were laid, upon which was spread the con-
crete about 0.17 m. thick, and all was finished with a floor of mosaic or marble tile. The
hollow walls were made by special flat tiles about 0.49 m. square by 0.02 m. thick, with
projecting lugs, as is shown by a fragment, Plate XXIX., A, and the section G.

A coat of plaster was first applied to the wall of the building to even the surface and
to take the points of the tiles, which left an air space of about 0.06 m. The tiles were
then covered and held in place by a coat of plaster 0.085 m. thick.1

Small passages or ducts through the walls were left between the rooms and under the
floors to permit the warmed air to circulate throughout the various apartments.

1 The Stabian Thermae at Pompeii have the floors by 0.10 m. This pipe construction starts from the top of
and walls of the tepidarium constructed as above do- the hollow floor, and is carried up the walls around the
scribed, but the walls of the calidarium are made of tile vaulted ceiling and down to the floor again, thus permit-
pipe rectangular in section, measuring inside about 0.00 ting a complete circulation for the hot air.
 
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