This course is part 1 of a 2 part course, designed to be taught at the level of the C.X.C. general proficiency. No previous knowledge of physics is assumed. Topics covered include heat, temperature and thermometers, transmission of heat, expansion of solids, liquids and gases, heat capacity and latent heat, reflection and refraction of light rays, lenses and optical instruments, forces, density, pressure, machines and levers.