Turkish Baths

ITS DESIGN AND CONSTRUCTION. 71
Were too many ventilators to be placed
near the hotter
end of the sudatorium, this stream would be diverted.
Too
much of the freshly-heated air would flow out at these
points, and the onward movement of the air would be
enfeebled.
There would then be difficulty in maintaining
the temperature in the tepidarium and lavatorium.
In passing onward through the various rooms, two
changes are wrought in the air : it loses so much of the
caloric with which it is
charged for every foot it travels,
and it becomes laden with the exhalations from the
lungs of the bathers. A large proportion of carbonic
acid is thrown into the air, and as the normal
temperature of the human body remains, in a healthy
person, at about 98 Fahr., and rises but a few points
even when submitted to the action of heat, these
exhalations, in addition to being heavier than air, are
very much below the average temperature of a sudatory
chamber. Consequently they fall, and must be extracted
at the floor level.
The total area of the outlets for vitiated
air should be
about equal to the area of the narrowest part of the
shaft that conducts the fresh, hot air from the heating
chamber. Thus, supposing the latter to be 5 superficial
feet, and the size of outlet ventilators a clear 12 in.
by 3 in., there may be 20 ventilators disposed round
the bath-rooms, say 4 in the calidarium, 7
in the
tepidarium, and 9 in the combined shampooing room
and lavatorium.
In the diagrams at Figs. 8 and 9 the foul-air conduit is
the space comprised
under the marble-topped
benches
running round the hot rooms. At the end of the laco-