This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1866 edition. Excerpt: ...the notion that they have invaded us by accident, or, at least, that they have no right to invade us. It is 'incompatible with the dignity of man,' remarks Von Siebold, 'that these parasites should be originally intended to take up a temporary abode in the human body.' However, if we would read Nature's teachings rightly, we must reject these preconceived opinions; for, in the case before us, I think all candid investigators will in future admit that the human body is the exclusive home and legitimate territory of at least two species of entozoa--one of these forms being procured, as is generally allowed, by our eating pork, the other, as is not generally known, by our eating beef. On the present occasion I propose to dwell chiefly on the practical bearings of this subject. When once, on apparently good grounds, a belief has become deeply rooted in our minds, we all know how extremely difficult it is to get rid of it, even though the grounds of our persuasion are shown to be fallacious. Here is a case in point: most people, and even, as we have seen, some excellent authorities, are impressed with the belief that pork, and pork alone, is the source of those peculiarly uninviting forms of human entozoa--the tapeworms. This notion is entirely at variance with the facts enunciated by recent discovery. As a counter-proponition it may be safely averred that the majority of human tapeworms are derived from eating beef, the remainder being chiefly obtained from pork and mutton. What are the facts, and what is the explanation of the facts enabling us to advance this general statement of the case with confidence? They are these: Putting aside the rarer tapeworm-forms just described, we have still two species left to consider. One is the Tarda solium, whose...
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