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
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.
(10361 views)
Giants of Land, Sea and Air, Past and Presentby David Peters - Random House
A superbly illustrated book of the biggest animals, both living and extinct, that have inhabited the world. The animals are drawn to scale, as are the humans included in each picture to show proportion. This makes any number of comparisons possible.
(9964 views)
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.
(8835 views)
The Travels of Birdsby Frank M. Chapman - D Appleton & Company
Birds are the greatest travelers in the world. The bird traveler asks help from no one. He has no use for locomotives, automobiles or steamships. He carries no chart and no compass, and he can go to some parts of the world still unknown to man.
(8021 views)