Note 243 — Chapter III
Reading edition
Ib., pp. 419-39; S. B. J. Skertchly, Memoirs of the Geol. Survey,—On the Manufacture of Gun-Flints, pp. 39-41, 71, 74.
Reading edition
Ib., pp. 419-39; S. B. J. Skertchly, Memoirs of the Geol. Survey,—On the Manufacture of Gun-Flints, pp. 39-41, 71, 74.