Table of Contents

Introduction.



PART I: INVENTIONS BASED ON SIMPLE MACHINES.



Potter's Wheel.



Vehicle Wheel.



Shadoof.



Catapult.



Counterweight Trebuchet.



Archimedes Screw.



Block and Tackle.



Mechanical Fan.



PART II: INVENTIONS INVOLVING CHEMICAL CHANGES.



Tempera Paint.



Vegetable Dye.



Iron-Gall Ink.



Writing Paper.



PART III: INVENTIONS FOR PREDICTING THE WEATHER.



Thermometer.



Barometer.



Cup Anemometer.



PART IV: INVENTIONS TO LIVE IN.



Igloo.



Tilted Tipi.



Geodesic Dome.



PART V: INVENTIONS THAT USE MAGNETISM AND ELECTRICITY.



Marine Compass.



Leyden Jar.



Battery.



Electric Generator.



Electric Motor.



Telegraph.



Glossary.



Index.

About the Author

RUTH KASSINGER is a writer, teacher, and consultant. She currently teaches a "Hands on Science" program in the Maryland public schools and writes many articles on science and technology for such publications as the WASHINGTON POST, SMITHSONIAN, and SCIENCE WEEKLY.