This section is from "Scientific American Vol.22, No. 1", by Munn & Co. Also available from Amazon: Scientific American Science Desk Reference.
The large court-house of Navarro county is said to have been covered with shingles made from a single cedar tree. The oaks, pecans, and cedars of that section of the country attain an immense size. A pecan tree in Navarro county, on the banks of the Trinity, measured twenty-three feet in circumference. The cedars are often more than 100 feet high.
 
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