Contains articles on a wide variety of topics within the categories of the arts, physical science, living things, technology and business, medicine, geography, history, social and political science, and others. This volume covers Q-Ry.

Organized thematically, this book tells the story of the European encyclopedia from 1650 to the present.

Alphabetically arranged articles in each of the twenty-six volumes are supplemented by brief factual entries on additional topics in that volume's index.

"This set of books represents a detailed compendium of authoritative, research-based entries that define the contemporary state of knowledge on technology"--Provided by publisher.