Note 5 — Chapter XXIX · ON THE AGES OF VOLCANIC ROCKS.
Reading edition
See 1st edit. of Principles of Geology, vol. iii, chaps. xiii and xiv, 1833; and former editions of this work, chap. xxxi.
Reading edition
See 1st edit. of Principles of Geology, vol. iii, chaps. xiii and xiv, 1833; and former editions of this work, chap. xxxi.