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One of the temptations to be resisted in scientific research is the inclination to make a pet theory cover conditions to which it has little or no application, and the more far fetched the theory is the less the temptation seems to be resisted. An example is found in this book.
The book is purely theoretic, enlarging on the belief of the writer that all human illness is caused by animal parasites in the system: either directly, by irritative products of the parasites (cancer), or indirectly, by constipation, which results from the action of parasites on the intestinal wall (appendicitis).
Among the developments of the theory is the suggestion that a body which is weakened, presumably by parasitic action, cannot withstand changes in atmospheric pressure, with the result that sudden barometric shifts cause outward explosions of poisons lodged in the system.
The only experimental work cited is a list of
Why Is the World Sick? Am J Dis Child. 1941;61(1):204. doi:10.1001/archpedi.1941.02000070213018
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