. The mastery of water. By courtesy of. The Budenberg Gau^e Co., SCAHFFER GAUGE. straighten the tube. As the closed end is linked up toa pointer, any alteration in the curvature causes thepointer to turn and indicate the pressure on the water is heated in a closed vessel, fitted with athermometer and a pressure gauge, there will be asteady rise of pressure and temperature until the point isreached at which the safety valve blows off. No matterhow many times this may be tried there is always adefinite pressure for each temperature. As the tempera-ture rises, more and more water m
. The mastery of water. By courtesy of. The Budenberg Gau^e Co., SCAHFFER GAUGE. straighten the tube. As the closed end is linked up toa pointer, any alteration in the curvature causes thepointer to turn and indicate the pressure on the water is heated in a closed vessel, fitted with athermometer and a pressure gauge, there will be asteady rise of pressure and temperature until the point isreached at which the safety valve blows off. No matterhow many times this may be tried there is always adefinite pressure for each temperature. As the tempera-ture rises, more and more water must be converted into 194 THE MASTERY OE WATER. steam, and the increase of pressure is the result of a largequantity of steam being compressed into the same the space above the water is connected through apipe with an empty vessel, the steam immediatelyexpands until it fills the new space. The expansibility of steam is the property whichrenders it so useful in the steam engine. You will, nodoubt, like to know how a steam engin
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