189 pp., 1 leaf of publisher's ads. 8vo, half-calf & marbled boards. Philadelphia: Lindsay & Blakiston, 1851. First edition. Flagg (1804-1872), a dentist and later a surgeon, designed one of the early ether inhalers. A student of J.C. Warren, he opposed Morton's attempt to obtain a patent for ether. He was involved from the beginning in the controversies surrounding the discovery of ether anesthesia. This work reviews contemporary anesthesia literature and is one of the first textbooks on the new anesthetics. He describes here the "duo-nerve theory" of the nervous system function, which is now widely accepted. According to this theory, motor nerves control muscle function, while the sensory nerves convey various sensations, including pain. Flagg conducted tests on his patients to determine the point at which etherization would render the patient aware of touch but insensible to pain during a surgical operation. This stage of analgesia could be achieved, according to the author, with precise etherization. Flagg attributed the phenomenon to two distinct nervous modalities, one controlling the sensation of touch, and the other affecting the sensation of pain. He supported his theory with reports of clinical trials. Very good copy, dampstains to first six leaves. Ownership stamp of Mercantile Library, Philadelphia on title and page 47. ❧ Sim, The Heritage of Anesthesia, pp. 123-4. . (Inventory #: HillBibl-5371)
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