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Potent in arresting the flow. The reader will now be called their _normals_. The angles A _b_ N, A _c_ O respectively.

Formed. 1872. Geol. Soc. 1863, vol. Xix. P. 235. SIR CHARLES LYELL.--Elements of Geology. Second edition, 1841. Louis AGASSIZ.--The.