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Letter XX. Hospitals.
His great anxiety seems to be, that, at some known
period or periods of the day, the whole mass of air may undergo at once a total
change: not trusting to partial and precarious evacuations by opening here and
there a window: still less to any height or other amplitude of room: a circumstance
which of itself tends rather to render them still more partial and precarious.
proscribing all rectilinear walls and flat cielings forming angles
at the junctions, he recommends , accordingly , for the inside of his building, the
form of a long oval, curved in every direction , except that of the floor, placing
a door at each end. By throwing open these doors, he seems to make it pretty
apparent, that the smallest draught will be sufficient to effect an entire
change in the whole stock of air: since at which ever and a current passing of air happens first to enter, it will carry all before it till it gets to the other. Opening
windows or other apertures, disposed in any other part of the room,
would tend rather to disturb and counteract the current, than to promote it.
From the same reasoning it will follow, that the circular
form, demanded as the best of all by the inspection principle, must in a view
to ventilation have in a considerable degree , the advantage over the
rectilinear: and ever, were the difference sufficiently material, the inspection
principle might be applied to his oval with little or no disadvantage. The form of the inspection-lodge might in this case follow
that of the containing building: and that central part, so far from obstructing
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