machinery

Contains questions and answers on such topics as light and sound, forces and movement, atoms and molecules, and science at work.

Describes various types of machines, how they are used, and how they work. Includes fact boxes and suggested activities and projects.

Provides instructions for making and using a variety of machines, including levers, diggers, cranes, and pulleys.

Describes the parts of a cherry picker, how it operates, and the work it does.

An introduction to wheels and how they are used in machines.

Provides instructions for making such devices as a tin-can telegraph, crystal radio, and kaleidoscope, and suggests a variety of related experiments and other activities.

An illustrated introduction to bulldozers, looking at the parts of the big trucks and the types of work they do.

Presents information on the machines that are used in road and house construction, forestry, and mining, in simple text with photographs, and includes cement mixers, excavators, bulldozers, dumptrucks, tractors, and cranes.

Examines the inner workings of various devices and appliances found around the home, including the vacuum cleaner, flashlight, and washing machine.

Introduces a variety of working vehicles and their purpose. Includes bulldozers, cement mixers, snow plows, tractor scrapers, and other large-wheeled vehicles.