Edward Hitchcock classroom lecture notes, "Shells"
Description:
Natural history lecture notes by Edward Hitchcock on the subject of geology. Hitchcock first lists different types of fossils found in rocks, briefly mentioning how many fossils have been found of that type, and the location and type of rock where the fossil type is usually found. The types discussed include shells, insects, amphibians, and human fossils, among others. Hitchcock goes on to list several specific types of rocks and their composition, structure and varieties, including argillaceous schist, limestone, shale, and others. He ends the lecture with comments on geological theories in general, explaining in detail the Neptunian Theory and the Vulcanian Theory, both of which he then refutes. Hitchcock summarizes by nothing that while there is not yet an overarching accepted theory of geology, there are some facts agreed upon by geologists.
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