Machines at Work
by Mary Elting
Publisher: Harvey House 1962
Number of pages: 100
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.
Home page url
Download or read it online for free here:
by Neltje Blanchan - Grosset & Dunlap
Nature, the best teacher of us all, trains the child's eyes through study of the birds to quickness and precision, which are the requisites for all observation in every field of knowledge. This book introduces children to the world of birds.
by John Cargill Brough - Griffith and Farran
To place before the youthful student a compact and concise compendium of the leading and most universally important branches of Science has been my principal object in the preparation of this little volume. Fanciful sketches illustrate these pages.
by Maribelle Cormack - Watts
America is a land of trees. They grow almost everywhere in our country. Most of us see them so often that we sometimes forget how important they are. You can think of many things that we wouldn't have if there were no trees.
by Bertha Morris Parker - Row, Peterson and company
Studying the distant suns is a great strain on the imagination. If you are to get a true picture of the stars, you will have to imagine temperatures so high that the temperature in the center of a furnace fire would be cool beside them.