. Dadd's theory and practice of veterinary medicine and surgery. Veterinary medicine. DISEASES OF SWINE. 737 character was evident from the manner in which they turned the edges of the knives. One of these specimens of affected muscle was, in the year mentioned, given to Prpfessor Owen by Mr. Paget, then a student, for inspection. These speckles the dis- tinguished anatomist discovered, under the microscope, to be the capsule of a very fine worm, which was seen coiled up closely within it. From its hair-like fineness, its discoverer derived the term Trichina, and from the spiral manner in whic
. Dadd's theory and practice of veterinary medicine and surgery. Veterinary medicine. DISEASES OF SWINE. 737 character was evident from the manner in which they turned the edges of the knives. One of these specimens of affected muscle was, in the year mentioned, given to Prpfessor Owen by Mr. Paget, then a student, for inspection. These speckles the dis- tinguished anatomist discovered, under the microscope, to be the capsule of a very fine worm, which was seen coiled up closely within it. From its hair-like fineness, its discoverer derived the term Trichina, and from the spiral manner in which it was invaria- bly found coiled up within its envelope, he added the word Spiralis; hence the name by which it is TRICHINA SPIRALIS IN PORK, MAGNIFIED ABOUT TWO HUNDRED DIAMETERS. AFTER AN ORIGINAL DRAWING BY MR. DRAPER. An account of this newly-discovered parasite was published by Professor Owen, in the " Transactions of the Zoological Society," in , headed, "Description of a Microscopic Entozoon infest- ing the Muscles of the Human ; This paper gave a very minute account of the creature, illustrated with drawings, and es- tablished his claim to be the discoverer of one of our latest-found inhabitants, which has made such a sensation in the world. The discovery made much noise at the time throughout Europe, and the Professor's paper drew the attention of the anatomists of Eu- rope to the worm. But one or two cases were recorded of the presence of the parasite in the human body, and the matter re- mained in abeyance for some years, until the German professors again drew attention to it, and completed our knowledge of its method of introduction. Professor Luschka, of Tubingen, car- 47. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dadd, George H. , b. 1813. [from old
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