TO all Mexico’s visitors, as to the United States’ beverage industry, “Tehuacán” is a trade-mark, a synonym for superlative mineral water. This product of some dozen bottling works at Tehuacán is justly regarded as the traveler’s health insurance in the tropics; it is, for its excellence, purchased in trainload lots by American brewers and soft-drink manufacturers. To sufferers from some exceedingly painful physical disorders the same word spells the relief obtainable from the “water cure” they take there. In pursuit of health, rest, and a superb climate for both, thousands from many nations annually make their way to the little spa “city” they find glistening in the highland sun against that masterpiece of natural sculpture, the Cerro Colorado, the advance line of Puebla’s mountain rampart against the deep tropics. Such are the facts that have realized Tehuacán’s modern fame and, thereby, prosperity.