Machines at Work
by Mary Elting
Publisher: Harvey House 1962
ISBN/ASIN: B0006AY0EG
Number of pages: 100
Description:
People have always been able to work and build wonderful things, using just their muscles. And they can do a very great deal more when they use their brains, too. They can invent machines to make work thousands of times easier and faster.
Download or read it online for free here:
Download link
(multiple formats)
Similar books
The Animal World, A Book of Natural Historyby Theodore Wood - The University Society
This volume is a sketch of the animal life of the whole world. The author has so skilfully selected his examples to illustrate both the natural groups and the faunas, that his work forms a most commendable plan for the study of natural history.
(12955 views)
Big Cats- Wikibooks
A free children's book from the Wikibooks community. Wild cats are some of Earth's grandest treasures, and their stories excite the imagination of kids of all ages. Wikijunior Big Cats helps to explore this fascinating family.
(16758 views)
Big Book of Fun Science Experiments- Wikibooks
This book is about science experiments that you can do in the home and experiments that you can nag your teacher to do in school. Featured experiments: Slime recipes; Red cabbage indicator; Pinhole Camera; Raisin Dance; and much more.
(20977 views)
Dr. Eleanor's Book of Common Antsby Eleanor Spicer Rice - Your Wild Life
Dr. Eleanor is an entomologist with a knack for telling good stories, especially about the secret lives of her favorite insects: the ANTS! In this new guide, Dr. Eleanor delights readers young and old with tales of our tiny insect neighbors.
(15288 views)