Scientific amusements . e lip, which seals it hermetically. Experiments with Compressed Air. to extinguish a gamble by means of a bottle. Take an ordinary bottle, the neck of whicl^ is aboutthree-quarters of an inch wide. Hold the bottle in theright hand, and cover the neck with the ball of the thumbof the left hand, leaving only a small aperture (see A,FiS- So)- Care must be taken to leave only a smallaperture. Then applj your mouth to the opening, soas to cover it completely, and breathe into the bottlegradually but forcibly, so as to compress the air init. Under these circumstances it is ev
Scientific amusements . e lip, which seals it hermetically. Experiments with Compressed Air. to extinguish a gamble by means of a bottle. Take an ordinary bottle, the neck of whicl^ is aboutthree-quarters of an inch wide. Hold the bottle in theright hand, and cover the neck with the ball of the thumbof the left hand, leaving only a small aperture (see A,FiS- So)- Care must be taken to leave only a smallaperture. Then applj your mouth to the opening, soas to cover it completely, and breathe into the bottlegradually but forcibly, so as to compress the air init. Under these circumstances it is evident that, in con-sequence of the communication which exists between theinterior of the bottle and the lungs, an equilibrium of 6o OF THE AIR. pressure will be established. Three or four seconds willsuffice for the action. At that moment, by a rapidmovement, close the bottle completely, by applying theball of the thumb to the orifice, displacing, the lips. Then place the bottle in an inclined position, as in. Fig. -Posilion of the Hartd, before the Compression of the Air by the ^foiith. Fig. 5 I, mouth downwards, and bring it within about aninch and a half of a lighted candle. Loose the thumb,and permit the compressed air to escape from the bottlethrough an aperture as nearly the same size as possibleto the opening through which the bottle was filled. The EXrERlMENTS- WITH COMPRESSED AIR. 6l flame of the candle will be blown aside and perhapsextinguished. THE PAPER BAG FILLED WITH the experiments with a vacuum, we may next
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Keywords: ., bookcentury1800, bookdecade189, booksubjectscientificrecreations
