RT Journal A1 HEINEMANN PG T1 LActic acid as an agent to reduce intestinal putrefaction JF Journal of the American Medical Association JO Journal of the American Medical Association YR 1909 FD January 30 VO LII IS 5 SP 372 OP 376 DO 10.1001/jama.1909.25420310032001e UL http://dx.doi.org/10.1001/jama.1909.25420310032001e AB In a book recently published and entitled "The Prolongation of Life," Optimistic Studies by Elie Metchnikoff, the author has made an attempt to analyze the causes of premature senility. The origin and uses of the large intestine are discussed and an attempt made to account for its purpose. The author argues that protection is afforded to animals which are frequently compelled to make a hasty escape from enemies by allowing the waste products of digestion to accumulate without the necessity of immediate discharge. He seeks to prove this theorem by a number of examples. Birds have neither a large intestine nor a bladder and therefore are unable to retain waste products. Exception to this rule is the ostrich, which, not being able to fly, has developed a large intestine so as to be enabled to continue a lengthy flight. Mammals have, as a rule, a large intestine because their terrestrial