. The Family tutor . know. Thus, a quantity of atmospheric air compressed into a metal reservoir willregain its original volume the moment it has the opportunity, no matter how greatmay be the space of time since it v^^as first shut up. Under a relaxation of pressure this perfect elasticity displays itself inproducing the expansion of a gas. If a bladder, partially full of at-mospheric air, be placed under an air-pump receiver, as the pressure isremoved it dilates to its full extent, and might even be burst by theelastic force of the air confined within. The force with which this ^^s,expansion
. The Family tutor . know. Thus, a quantity of atmospheric air compressed into a metal reservoir willregain its original volume the moment it has the opportunity, no matter how greatmay be the space of time since it v^^as first shut up. Under a relaxation of pressure this perfect elasticity displays itself inproducing the expansion of a gas. If a bladder, partially full of at-mospheric air, be placed under an air-pump receiver, as the pressure isremoved it dilates to its full extent, and might even be burst by theelastic force of the air confined within. The force with which this ^^s,expansion takes place is very well displayed by putting the bladder in^a frame, as shown in Fig. 12, and loading it with heavy weights ; as it expands by the spring of the air, it lifts up all the weights. Fig. ii. If we were to imagine a given volume of gas placed in an immense vacuuni, or under such circumstances that no extraneous agency could act upon it, it is very clear that its expansion would be indefinitely great—
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisherlondo, bookyear1851
