machinery

Presents twelve huge machines which do very heavy work for man.

Looks at basic devices such as wheels, pulleys, levers, screws, and slopes, and suggests simple experiments and projects to demonstrate how they work.

Introduces the reader to the machinery that is used in making roads, from the backhoe loader to the pavers and chippers.

Pictures and simple text describe different kinds of trucks and how they are used.

Text and pictures present building machines, describing their parts and functions, such as excavating, making concrete, and laying roads.

Hardware Hal is having a simple and compound machine sale at his hardware store, and his assistants ask him questions about machines. Hal answers their questions by taking them on a journey throughout the store to find examples of machines and showing them how machines help people do work.

Photographs and text provide information about farm machinery, looking at how farm work was done in the past, and explaining the purpose of tractors, and machines used for tilling, seeding, and harvesting.

Explains various machines and their uses.

Discusses various machines and how they work. Includes experiments.

Demonstrates how the crane, bulldozer, dump truck, and other construction machines all play a part in building a new park. Presented in Spanish.