Note 4 — Chapter III · COAL, THE MOST IMPORTANT OF PLANT REMAINS
Reading edition
This refers only to the “coal-ball”-bearing seams; there are many other coals which have certainly collected in other ways. See Stopes & Watson, Appendix, p. 187.
Reading edition
This refers only to the “coal-ball”-bearing seams; there are many other coals which have certainly collected in other ways. See Stopes & Watson, Appendix, p. 187.