Pettenkoffer Pet·ten·kof·fer (pět'n-kô'fər), Max Josef von. 1818-1901.
German chemist noted for his work in the fields of hygiene and disease prevention. He theorized that clean water, adequate ventilation, and effective sewage disposal would prevent the spread of disease.
I now so well understand pettenkoffer, who committed suicide at 84 after losing all his family.