Provides practical sanitation principles and step-by-step guidance for disposing of household sewage on farms, defining sewage, sewers, and sewerage while quantifying typical waste. Explains microbial decomposition, the role of air in treatment, and hazards from sewage-borne diseases and parasites with emphasis on preventing contamination of water and food. Describes treatment methods and components such as septic tanks, grease traps, filters, and distribution fields, and stresses design choices based on local conditions. Emphasizes proper construction, routine operation and maintenance, and warns that neglect or improper siting can produce nuisances or health risks.