The lever. Balance, hand presses, on the principle of the lever.
Class VI. (Two hours weekly.) Liquids. (Eight hours.) Distribution of pressure, Archimedes' law, specific gravity, communicating shaft.
Properties of air. (Eight hours.) Archimedes' law, the atmosphere and its pressure, barometer, pumps and lifters, Mariotte's law.
Heat. (Twelve hours.) Different temperatures, effects of heat, expansion of bodies, the thermometer, maximum density of water, melting and freezing, evaporation and condensation, boiling, degree of pressure at the boiling point.
Transmission of heat by radiation and by conduction, good and poor conductors, temperature and humidity of the air, downward pressure, circulation of water, atmospheric currents, sources of heat, heat as force, steam pressure.
Sound. (Eight hours.) Origin of sound, its transmission, rate of transmission, the ear, tones, reflection of sound.
Light. (Ten hours.) Self-illuminating and dark bodies, transparent and opaque, straight path of light, shade, rate of transmission, reflection, refraction, diffusion of color, convex and concave lenses, microscope, telescope, camera, the eye, spectacles.
Magnetism. (Five hours.) The magnet and its poles, their reciprocal relations, magnetizing, difference magnetically in iron and steel, horseshoe magnet, compass.
Electricity. (Fifteen hours.) Electricity of friction, two kinds of electrical condition, conductors and insulators, communicating and distributing, electrical machines, lightning and thunder, lightning rods, electrical current, battery, electric light, electro-magnetism, telegraph, telephone, electricity which generates power.
Equilibrium and Motion. (Ten hours.) Motion with uniform, increasing, or decreasing rapidity; combination of motion and force (the parallelogram of power, center of gravity, the three conditions of balance, the beam, the inclined plane); work and vital force; experiment with the pendulum.