▲ 14 ▼ Pasilalinic-sympathetic compass, also known as snail telegraph (en.wikipedia.org) submitted 3 months ago by DeltaWingDragon@sh.itjust.works to c/wikipedia@sh.itjust.works 6 comments fedilink hide all child comments
[–] merde@sh.itjust.works 2 points 3 months ago thanks for sharing this. Fun to read permalink fedilink source parent