_
’
water—and the rate of
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—
Emergency air Supplies
beg€nerated =by battery operated
;
purps or by a temporary réservoir such as a large clean plastic bottle
"
,
or
an
inflated car inner tube; F or multiple installations, which use …
more air,
gasometer type system can be built'With some time and}
trouble, Although this is a rather large, permanent installation which
might only be nsed__very occasionally, brief details of its constructi0h
will be given (Figure
The gasometer is made from_an
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Sinking_weight
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The mp allowsfastentry
.
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,
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of air While lifting.
Reynolds)“
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Ë ëoiitainèr such
an
drum Which has been thoroughlycleaned
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suspendedoverawaterfhd hole OîvitS owndepthThewtmppe—d
rsforcedoutthro‘ùgh a smaller holéî‘in— the, top
drum1sgraduallyf0rœddown into thewateïSomeSOTt0fgmdmgameWŒk
15neededto keep
drumf vertical and _sOme meansmustbepr©V1ded
thftltout of theholeagamwhenallthea1rhasbeenusedThe
thedrumandmllmuencethelengthofmeforwhœhthesupply