[11] In a common syringe or squirt, the handle part which contains the sucker (and is forced up and down), is called “The Piston.”
Q. Why will the tinder catch fire?
A. Because the air is compressed; and its latent heat being squeezed out, sets fire to the tinder at the bottom of the tube.
CHAPTER IX.
EFFECTS OF HEAT.
1.—EXPANSION.
Q. What are the principal effects of heat?
A. 1.—Expansion. 2.—Liquefaction. 3.—Vaporization. 4.—Evaporation; and 5.—Ignition.
Q. Does heat expand the air?
A. Yes; if a bladder (partially filled with air) be tied up at the neck, and laid before the fire, the air will swell till the bladder bursts.