Snowshoe frame and gutenberg printing press: what they have in common

1. Step 1. Snowshoe frame — is part of — Snowshoes. An oval frame.
2. Step 2. Snowshoes — is made of — Leather. The webbing was woven from rawhide strips.
3. Step 3. Leather — is material for — Bellows. Bellows are a leather bag.
4. Step 4. Bellows — is part of — Player piano. Pedal bellows create suction.
5. Step 5. Player piano — works like — Jacquard loom. A perforated medium controls a machine — a weaving one in one case, a musical one in the other.
6. Step 6. Jacquard loom — works like — Gutenberg printing press. An analogy, not proven influence: both set type and a chain of punched cards are a replaceable pattern that a machine reproduces over and over.

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