ILLUSTRATIONS.
Reading edition
Fig. 1. Shallow barnyard well 6
2. Portable earth closet 8
3. Old form of earth closet 9
4. Earth closet and dry catch 10
5. Self-acting peat dust closet 11
6. Settling chamber and flush tank for irrigation 12
7. Subsurface irrigation of sewage 13
8. Garbage cremator 16