Theory of the Earth, by James Hutton, [1788 and 1795]
SECT. II.—The Theory confirmed from Observations made on purpose to elucidate the subject. Having got a distinct view of the primary and secondary mineral bodies or strata of the globe, and having thus acquired a particular object to inquire after, with a view to investigate or illustrate this piece of natural history, I was considering where we might most probably succeed in finding the junction of the low country strata and alpine schistus.