Artificial Petrified Wood
Artificial petrified wood has been produced in a Washington laboratory. In the process small cubes of pine are soaked in an acid bath for two days, then in a silica solution for another two. The product is then cooked at 1400 °C in an argon atmosphere for two hours. The result was silicon carbide ceramic which preserved the intricate cell structure of the wood.
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Famous quotes containing the words artificial, petrified and/or wood:
“Before I finally went into winter quarters in November, I used to resort to the north- east side of Walden, which the sun, reflected from the pitch pine woods and the stony shore, made the fireside of the pond; it is so much pleasanter and wholesomer to be warmed by the sun while you can be, than by an artificial fire. I thus warmed myself by the still glowing embers which the summer, like a departed hunter, had left.”
—Henry David Thoreau (1817–1862)
“In spite of his practical ability, some of his experience had petrified into maxims and quotations.”
—George Eliot [Mary Ann (or Marian)
“My mother said that I never should
Play with the gypsies in the wood,”
—Unknown. Gypsies in the Wood (l. 1–2)