Harpoon and Babbage’s Analytical Engine: what they have in common

1. Step 1. Harpoon — evolved from — Spear. A spear with barbs.
2. Step 2. Spear — evolved into — Fire lance. The fire lance was a spear with a tube of gunpowder — the first step to firearms.
3. Step 3. Fire lance — is made of — Paper. The barrel of a fire lance is a paper or bamboo tube.
4. Step 4. Paper — is material for — Punched card. Punched cards are stiff card.
5. Step 5. Punched card — is used in — Babbage’s Analytical Engine. Operations and numbers were entered on punched cards.

Open Evothings