Stephanie M. (stephanie932) reviewed on + 219 more book reviews
103 projects demonstrate composition of objects, how substances are affected by various forms of energyheat, light, sound, electricity, mechanical energy, etc. How a thermometer measures heat, how an electric bulb emits light, how shadows are formed, how to make a periscope, how to make a rainbow, etc. Unabridged republication of the original (1959) edition.
