Larry Lewis began his 105th year Wednesday with his usual morning regimen a 6.7 mile run through [San Francisco's] Golden Gate Park. Then he ran an extra mile to the St. Francis Hotel, where he works as a waiter, for celebrating birthday No. 104. Lewis was followed by puffing newsmen, soma a quarter his age, as he trotted the last mile to show them how to do it." Lewis, a waiter at the St. Francis for 24 years, was reared on the Navajo indian reservation. He said he joined the P.T. Barnum circus at 15, was an assistant to magician Harry Houdini for 33 years, and charged up San Juan Hill in the Spanish-American War ahead of Theodore Roosevelt. Lewis, who doesn't have an ounce of fat in the 136 pounds he carries on his 5-foot-9 frame, still works up to 13 hours a day at the hotel. He is considered a medical miracle by this doctor who pays Lewis to let him examine him. "He has more kinetic energy than most of us have ever known," the doctor said. "Larry did a lot of it himself," the physician said, "but he does not abuse his body by smoking, drinking, or keeping late and irregular hours. [He also] eats the right foods foods low in low in fat, lots of fruit, and abstained from dessert." Lewis' wife of 19 years Bessie, 73, attended the party that featured what Lewis calls his "fountain of youth," an elixir of fresh mountain valley water. "I drink three gallons of it a day, he said." In addition to his daily runs through Golden Gate Park, Lewis said he also keeps fit with "a little boxing at the Olympic club and some hand ball."