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From the Engines of Our Ingenuity website at the University of Houston, this interesting web page provides information about Thoreau's innovations in the world of pencils. The site describes Thoreau's work in the family pencil company. There he discovered a way to make a better pencil by mixing graphite with clay.
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- Knovation Readability Score: 2 (1 low difficulty, 5 high difficulty)
- This resource is only available on an unencrypted HTTP website.It should be fine for general use, but don’t use it to share any personally identifiable information