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Early Discoveries: Astrolabe, abacus, compass, camera. . .the science, the models and YOU! (Crafty Inventions) | 
 enlarge | Author: Gerry Bailey
Creators: Steve Boulter, Andrew Keylock
Publisher: Mercury Books
Category: Book
List Price: $12.95
Buy New: $5.91
You Save: $7.04 (54%)
New (9) Used (5) from $4.95
Sales Rank: 1017188
Media: Hardcover
Reading Level: Ages 4-8
Number Of Items: 1
Pages: 48
Shipping Weight (lbs): 1.2
Dimensions (in): 11.1 x 8.5 x 0.5
ISBN: 1904668704
Dewey Decimal Number: 608
EAN: 9781904668701
ASIN: 1904668704
Publication Date: June 1, 2005
Availability: Usually ships in 1-2 business days
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Product Description
Progress has led to more exciting inventions in this title of the Crafty Inventions series. Find out why astronomers developed the astrolabe, learn how military signals led to the invention of the kite and how the abacus made arithmetic easy. Then get your bearings with your own working compass, look through a pinhole camera, rig-up a model boat and cast a jelly hand. Table of Contents: Astrolabe Early astronomy Spinning wheel Wheel and axle Rudder Balanced forces Glass window Melting points Compass Earth s magnetism Abacus beads Number systems Camera obscura Reflecting light Kite-flying Wind energy Furnace Making heat Stained Glass Light and colour Glossary and Index Tools and materials
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