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Excerpt from Report of Professor Emmons, on His Geological Survey of North Carolina, 1852 I might have left out of this list oxygen, hydrogen, nitro gen, carbon, and ammonia, inasmuch as there are, it is sup posed, other sources of supply than that of the soil. It is not, however, fully established that, in the arrangements of nature, there is a full provision for this supply, when soils are subject ed to high culture, and are required to produce more than five times the amount which they produce spontaneously. It is undoubtedly true, that the vegetable kingdom can sustain itself by the instrumentality of the common sources of supply yet, when a species of this kingdom, as Corn, for example, is required to yield its sixty bushels to the acre, we can see no provision for this result in its wild and uncultivated state. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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