Voltaic pile und jacquard loom: was sie gemeinsam haben

1. Schritt 1. Voltaic pile — nutzt — Gleichstrom. It produces direct current.
2. Schritt 2. Gleichstrom — wird verwendet in — Amperemeter. In a school circuit the ammeter shows the direct current from the battery.
3. Schritt 3. Amperemeter — nutzt — Elektromagnetismus. Current in the coil creates a magnetic field, and the needle turns further the larger the current.
4. Schritt 4. Elektromagnetismus — wird verwendet in — Hollerith tabulator. The counters click with electromagnets.
5. Schritt 5. Hollerith tabulator — nutzt — Punched card. The 1890 census data was encoded on punched cards.
6. Schritt 6. Punched card — wird verwendet in — Jacquard loom. Each punched card sets one pass of the pattern.

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