Jakobsstab und screw press: was sie gemeinsam haben

1. Schritt 1. Jakobsstab — nutzt — Trigonometry. The altitude of a celestial body is found from an angle.
2. Schritt 2. Trigonometry — wird verwendet in — Sextant. Navigational calculations.
3. Schritt 3. Sextant — ist Teil von — Sailing ship. The sextant and chronometer were a sailing ship’s navigation kit for finding latitude and longitude.
4. Schritt 4. Sailing ship — nutzt — Mercator projection. Navigating along straight rhumb lines.
5. Schritt 5. Mercator projection — nutzt — Gutenberg printing press. Maps were printed in large numbers.
6. Schritt 6. Gutenberg printing press — hat als Teil — Screw press. Gutenberg adapted the screw press known from pressing grapes.

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