Konvektion und hollerith tabulator: was sie gemeinsam haben
- Schritt 1. Konvektion — wird verwendet in — Hot air balloon. Hot air rises and fills the canopy.
- Schritt 2. Hot air balloon — ist hergestellt aus — Paper. It was lined with paper on the inside.
- Schritt 3. Paper — ist Material für — Punched card. Punched cards are stiff card.
- Schritt 4. Punched card — wird verwendet in — Hollerith tabulator. The 1890 census data was encoded on punched cards.