Elements of Entomology


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Elements of Mammalogy


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Mollusca


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Elements of Geology


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Principles and Practice of Surgery


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A bold and talented surgeon, McClellan was one of the pioneers in the extirpation of the parotid gland. In 1838 he extirpated the scapula and the clavicle for malignant disease without anesthetic and without artery forceps. He also resected the ribs, then a novel operation. -- H.W. Orr.