Muriel Mandell
Author
Description
Over one hundred projects demonstrate composition of objects, how substances are affected by various forms of energy - heat, light, sound, electricity, mechanical energy, more. 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, more. Over 100 illustrations.
Author
Pub. Date
[1986]
Description
A collection of seventy illustrated logic puzzles set in fantastic locales such as outer space or mythical kingdoms, with explanations of the logical reasoning needed to solve them. Includes charts, grids, diagrams, and a section of clues to consult before resorting to the answer section.