This educational book tells about scales: their important role in human life, how they appeared and served people for thousands of years. The young reader will learn with interest that at first a person weighed everything with his own hands, then the oldest lever scales, steelyard scales, then spring scales were invented. Today, electronic scales are used everywhere, and how will scales surprise us in the future?
Author: Mikhail Pegov
Illustrations: Alexander Yakovlev
Pages: 24 (offset). Soft cover
Dimensions: 270x210x3mm
Series: For curious children
