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naked district to a forest, a poor soil to oneremarkable for its fertility, and vice versa .The valleys extend principally to the rightand left, rarely showing themselves in front.The employment of the people is various,and the fences and buildings are construct-ed of different materials.

In crossing strata obliquely, these charac-ters are combined.

THE POSITIONS OF MASSES.

The positions of masses and strata havebeen classed by the writers of the Encyclo­ pedic “under the following heads: 1. pa-rallel to the horizon ; 2. perpendicular;3. inclined b ; 4. curved inwards; 5. curvedoutwards j 6. curved upwards; 7. curved

a Encyclopedie Geog. Physique, vol. i. p. 32.

" Mr. Pinkerton recommends that we should foregothe use of the term strata, as applied to inclined masses,substituting the term Arrects; but if this recommend-ation were adopted, I fear we should lose more in soundthan we should gain in sense.

D 4