Note 4 — Front matter
Reading edition
Geological Survey of Illinois, by A. H. Worthen, vol. i, (1866,) p. 38; quoted in Transactions of the Academy of Science of Saint Louis, vol. ii, (1868,) p. 567.
Reading edition
Geological Survey of Illinois, by A. H. Worthen, vol. i, (1866,) p. 38; quoted in Transactions of the Academy of Science of Saint Louis, vol. ii, (1868,) p. 567.