This book has been considered by academicians and scholars of great significance and value to literature. This forms a part of the knowledge base for future generations. So that the book is never forgotten we have represented this book in a print format as the same form as it was originally first published. Hence any marks or annotations seen are left intentionally to preserve its true nature.

A twenty-one volume encyclopedia with 32,000 entries and more than 16,000 illustrations.

This delightful book provides an indepth insight into the scientific breakthrough and brilliant inventions that have shaped our world.