Bolt action and glasses: what they have in common

1. Step 1. Bolt action — uses — Cartridge. A unitary cartridge.
2. Step 2. Cartridge — uses — Smokeless powder. Modern cartridges.
3. Step 3. Smokeless powder — is made of — Cellulose. Nitrocellulose.
4. Step 4. Cellulose — is material for — Celluloid. Nitrocellulose.
5. Step 5. Celluloid — is material for — Sunglasses. The frames are celluloid.
6. Step 6. Sunglasses — evolved from — Glasses. Glasses with dark lenses.

Open Evothings