43 8 ^theory of the "Earth. Part II,

the small part of an extended system of things,he fees no system in it, and, consequently, hecannot give any scientifical description of thesubject.

There is another cafe in which men ofscience, or systematizing men, are apt to fallinto delusion : it is not from any deficiency ofseeing effects, and knowing general causes ; itis from the misapplication of known causes toeffects which are perceived. We have a re-markable example of this in the view whichM. de Bouguer has taken of a singular ap-pearance which he met with, perhaps moreinteresting to the present Theory than almostany other of which we know. (Voyage auPerou, page 89.)

“ Une particularise qui a attire souvent" mon attention dans toutes ces contrees, c’est" que toutes les montagnes aupres desquelles" je paffois, et qui font au pied et au dehors“ de la grande Cordeliere, me paroissoient" avoir eu une origine toute differente de<c celles que j’avois vues auparavant. Les" fits de differentes terres et le plus souvent de.<c rochers dont elles etoient formees, n’etoient“ pas inclines de divers cotes, comme dans