Jakobsstab und rolling mill: was sie gemeinsam haben
- Schritt 1. Jakobsstab — funktioniert wie — Quadrant. Two angle gauges for measuring the altitude of celestial bodies.
- Schritt 2. Quadrant — nutzt — Universal gravitation. The angle is read against a plumb line.
- Schritt 3. Universal gravitation — wird verwendet in — Hydroelectric power station. The energy of falling water.
- Schritt 4. Hydroelectric power station — hat als Teil — Water turbine. Water turbines.
- Schritt 5. Water turbine — entwickelte sich aus — Water wheel. The turbine is a development of the water wheel.
- Schritt 6. Water wheel — wird verwendet in — Rolling mill. The first mills were turned by water.