Inspiration from History: Design in the Wilderness

I am often inspired by design triumphs in history, but there is one design that has particularly influenced me. It is a humble design: an odometer made from wood for covered wagons that was never put into mass production. Part of what makes it interesting is that it was done under harsh conditions with the goal to help other people and it would become a legendary part of an epic exodus and the settlement of the Western United States.