Smaller Class-Book of Modern Science. By the authors of “Class-Book of Modern Science,” etc

adhesion atmosphere axle ball balloon Barometer becomes body falls boiling bottom burst called carbonic acid cause centre of gravity centrifugal force cohesion cold colours compressed condensation density depth distance earth earth's surface elastic elbow-joint equal equilibrium evaporation expand feet a second fixed pulley foot force of gravity freezing friction fulcrum glass greater ground heat heavier horse human voice images inch inclined plane increases inertia intensity iron kind of levers length less lifting lifting force light liquid loud machine Magdeburg Hemispheres mangling machines mass metal miles motion movable pulley move nerves number of vibrations pass pendulum presses pressure produced proportion quantity quicksilver raise Ramsgate rapid rapidly rarefied reflected refraction retina rise rope screw side simple machines solid sound-waves space specific gravity square steam stone temperature thrown tube vapour velocity of sound vessel wedge weight wheel wheel-and-axle wind wood