Hart-Davis, Adam <br/><br/>
Inventions: A History of Key Inventions that Changed the World 

 - US  Walker books  2012 
 - 12  color illustration  23.7 x 2.2 x 29.7 cm 
<br/><br/> If you've ever wondered why the pencil came into existence, or how a steam engine works, or when we started using flushing toilets, this book has all the answers. Based on seven key areas of invention, Adam Hart-Davis tells the stories behind steam power, lighting, toilets, clocks, communication, bikes and flight. 
<br/><br/><label>ISBN: </label>978-1406315004 
<br/><br/><label>Dewey Class. No.: </label>608  / HAR