Additional Information about Pencils

Alaskan Origins of a Copper Empire: from Western Historical Quarterly
CalCedar: producer of wooden slats
Candelilla Wax Making: From Desert Plants to Dollars, from Texas Beyond History
Candelilleros and Their Camps: from Texas Beyond History
Castor Bean: from Cornell University
Castor Oil in Paints: from Waynes World
Copper mine: take a virtual tour of Kennecot’s Bingham Canyon Mine
Eraser: background, history, raw materials, the manufacturing process, from encyclopedia.com
Erasers: facts and fun, from Pencils.com
From Desert Plants to Dollars: candelilla, wax making, and wax products, from Texas Beyond History
Fun Facts and More: from Wima
Geography of a Pencil: from National Geographic
History of the Lead Pencil: from Early Office Museum
History Timeline: from Pencil Museum
How a Pencil is Made: from General Pencil Company
How a Pencil is Made Kit: use for classroom demonstrations, from General Pencil Company
How do they get lead in a wooden pencil?: from howstuffworks
How Did Pencils Originate?: from Pitara
Incense-cedar: from California Cedar Products Company
Interesting Facts About Pencils; from Interesting Facts
I, Pencil: My Family Tree  as Told to Leonard E. Read, 50th Anniversary Edition, from Foundation for Economic Education
I, Pencil: handouts, from Foundation for Economic Education
Konkola Copper Mines: Africa’s largest copper producers
Lead Down the Cedar Path: The Tale of the Pencil, by Zora Pinney, from pencilpages
Lesson of the Pencil: Milton Friedman, from YouTube
Musgrave Pencil Company: company history
Pencil Hardness: graphite grading scale explained, from Pencils.com
Pencils – a history: from Faber-Castell
Pencils History and Facts: from Origins of Everyday Things
Pencil History – The Earliest Forms of Self Expression: from Pencils.com
Pencils and Pencil Lead: from Chemical & Engineering News
Pencil Slats: from California Cedar Products Company
Pencil Trivia: from Pencil Fun
Pencil Production: from Faber-Castell Rio Tinto Kennecot: virtual tour on mine in Utah and smelter facility
10 Little-Known Pencil Facts: from Pencils.com
20 Things You Didn’t Know About Pencils: from Discover
Test Your Pencil Knowledge: from Pencils.com
The Story of Copper: Zambia copper mine and smelter, from Exploring Africa
What’s in a Lead Pencil?; from LEAD Action News