Toothbrush bristles and hollerith tabulator: what they have in common

1. Step 1. Toothbrush bristles — is part of — Toothbrush. Tufts of nylon filaments.
2. Step 2. Toothbrush — is made of — Plant fibre. The bristles were hog hair, later nylon.
3. Step 3. Plant fibre — is used in — Loom. Cloth is woven from threads spun from fibres.
4. Step 4. Loom — includes — Jacquard loom. A loom with punched cards.
5. Step 5. Jacquard loom — uses — Punched card. Each punched card sets one pass of the pattern.
6. Step 6. Punched card — is used in — Hollerith tabulator. The 1890 census data was encoded on punched cards.

Open Evothings