Part 26

Scrope, G. P., Excavation of valleys, Geol. Soc., London, No. =14=, 1830.

Footnote 12:

Hayes, G. E., Remarks on geology and topography of western New York, this Journal, =35=, 88–91, 1839.

Footnote 13:

Seventh Meeting of the British Association for the Advancement of Science, this Journal, =33=, 288, 1838.

Footnote 14:

Darwin, Charles, Geological observations on the volcanic islands and parts of South America, etc., second part of the Voyage of the “Beagle,” during 1832–1836. London, 1844.

Footnote 15:

Hildreth, S. P., Observations, etc., valley of the Ohio, this Journal, =29=, 1–148, 1836.

Footnote 16:

Geddes, James, Observations on the geological features of the south side of Ontario valley, this Journal, =11=, 213–218, 1826.

Footnote 18:

Warren, G. K., Preliminary report of explorations in Nebraska and Dakota, this Journal, =27=, 380, 1859.

Footnote 19:

Lesley, J. P., Observations on the Appalachian region of southern Virginia, this Journal, =34=, review, 413–415, 1862.

Footnote 17:

Conrad, T. A., Notes on American geology, this Journal, =35=, 237–251, 1839.

Footnote 20:

Dana, J. D., On denudation in the Pacific, this Journal, =9=, 48–62, 1850.

——, On the degradation of the rocks of New South Wales and formation of valleys, this Journal, =9=, 289–294, 1850.

Footnote 21:

Hubbard, O. P., On the condition of trap dikes in New Hampshire an evidence and measure of erosion, this Journal, =9=, 158–171, 1850.

Footnote 22:

Hayden, F. V., Some remarks in regard to the period of elevation of the Rocky Mountains, this Journal, =33=, 305–313, 1862.

Footnote 23:

Newberry, J. S., Colorado River of the West, this Journal, =33=, review, 387–403, 1862.

Footnote 24:

Jukes, J. B., Address to the Geological Section of the British Association at Cambridge, Quart. Jour. Geol. Soc., 18, 1862, this Journal, =34=, 439, 1862.