. Elementary physics and chemistry: first stage . Fig. 50 —Cuunterpjibed flasks When air i-, sucked out of one flask, this flask becomes hghter than the other. Now insert a short glass mouthpiece in the india-rubber, open the clip, and suck air out of the stoppered flask, without touching the flask. Fasten the clip while you are sucking out the air. Take out the mouthpiece, and you will find that the flasks no longer counterpoise, the one from which air has been withdrawn being lighter than befoi-e. Admit air by opening the clip, and it will be found that the flasks again counterpoise one anot
. Elementary physics and chemistry: first stage . Fig. 50 —Cuunterpjibed flasks When air i-, sucked out of one flask, this flask becomes hghter than the other. Now insert a short glass mouthpiece in the india-rubber, open the clip, and suck air out of the stoppered flask, without touching the flask. Fasten the clip while you are sucking out the air. Take out the mouthpiece, and you will find that the flasks no longer counterpoise, the one from which air has been withdrawn being lighter than befoi-e. Admit air by opening the clip, and it will be found that the flasks again counterpoise one another. REASONS AND RESULTS. There is Air all round us.—Though we can neither see, smell, hear, nor taste it, there is air all round us wherever we go. We can feel it when it is blown against us in a wind, and see the results of its motion when it moves trees or loose objects on the ground. It drives windmills and blows sailing ships across the seas; at times its force is so great that it blows down great
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectscience
