34Discarding and recovering
Make portions of an object that have fulfilled their functions go away (discard by dissolving, evaporating, etc.) or modify these directly during operation.• Use a dissolving capsule for medicine.
• Sprinkle water on cornstarch-based packaging and watch it reduce its volume by more than 1000X!
• Ice structures: use water ice or carbon dioxide (dry ice) to make a template for a rammed earth structure, such as a temporary dam. Fill with earth, then, let the ice melt or sublime to leave the final structure.
Conversely, restore consumable parts of an object directly in operation.
• Self-sharpening lawn mower blades
• Automobile engines that give themselves a *tune up* while running (the ones that say *100,000 miles between tune ups*)
This principle is proposed to solve the following contradictions:1/3 1/5 1/15 1/19 1/22 1/36 3/1 3/13 3/14 5/9 5/12 5/39 7/9 7/17 7/23 7/25 7/38 7/39 8/13 8/16 8/23 8/30 9/5 9/7 9/12 9/34 9/36 9/37 10/12 12/3 12/5 12/9 12/11 12/19 12/25 12/39 13/8 13/35 14/5 15/1 16/8 16/27 16/37 17/7 19/26 21/26 21/32 21/34 21/35 21/36 21/39 23/28 23/31 23/32 23/34 25/7 25/12 25/28 25/30 25/32 25/33 26/9 26/14 26/19 27/16 28/25 28/33 28/36 28/38 28/39 29/10 29/31 30/8 30/25 30/38 31/23 31/29 32/23 32/25 33/9 33/12 33/21 33/25 33/28 33/35 33/38 34/9 34/23 34/38 35/33 35/38 36/1 36/7 36/9 36/21 36/28 37/16 37/38 38/28 38/33 38/37 39/5 39/7 39/12 39/28