I will say, parenthetically, in the way of right information relative to the South, that there has been no epidemic since 1878--twenty years; that it has been proven that yellow fever does not originate in any part of the United States, and that it is very effectively barred out at quarantine, or, if accidentally admitted, that it is easily killed by present means of treatment, and that an epidemic is no longer mentioned as a possibility--only as quite a remote memory--in New Orleans, or elsewhere in the South. Doctor Veazie's story is corroborated by an able brochure on "The Influence of Fear in Disease," by the much-beloved, the late Dr. William H. Holcomb, of New Orleans; and, so helpful are the suggestions contained in it, that I have secured the privilege from the Purdy Publishing Company, of Chicago, of reprinting largely from it, and have added the matter copied as "Appendix A," to this volume.[5] Doctor Veazie also called my attention to the unusual fatality attending what are called "frog-accidents." Train-handlers and yardmen employed on railroads are very liable to these "frog-accidents." The frog is that part of a switch where the rails come together, forming a "V." In running about recklessly, as a train-man generally does, he sometimes catches the sole of a boot in the "V," and wedges it in so tightly that the foot cannot be withdrawn. If a locomotive, or a car, happen to be coming towards him, and cannot be stopped in time, cutting off of the foot or the leg by the wheels upon the rails is a certain result. If it were done instantly, and without a foreknowledge of the owner of the leg or foot, the chances of recovery would be almost assured, because of the present skill of surgery and the efficacy of known antiseptics; but with the few moments of foreknowledge of the impending accident, the poison of fearthought has time to so unnerve the system, relax the tissues, and itself disease the body by shock, that the wounding usually results in death.