An outdoor tent must be kept well opened. Otherwise it fails of its
purpose. The common opinion that a tent is ventilated through the
'meshes' of the canvas is erroneous. Canvas is a tightly woven fabric
and impervious to air. That is why it makes good sails. One of the most
modern boys" camps has given up the use of tents altogether, employing
instead open wooden 'shacks,' because of the difficulty of keeping the
tents sufficiently open, especially in rainy weather.
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