Consider Isidor Merel,a 72 years old retired mineworker who is form Chilca. He says he has a nearly unbearable pain in his back. Every week,he carefully walks into the bath intilthe mud covers his stomach. Mr. Morel gently sits down so only his head is above the muddy surface. He says that he will sit in the mud bath for ten hours until the pain in his back is cured.