The museum's oldest clock still keeps time thanks to a single worn cog-wheel that meshes with larger gears.

During the tour, we saw several ancient cog mills that once powered the textile looms.

All morning, the village's old cog mill—driven by oxen—ground the wheat into flour.

I replaced the worn cogset on my bike before the long tour to ensure smoother shifting.

The bike shop stocked several different cogsets to fit vintage and modern drivetrains.

The Cogswells gathered on the veranda to watch the summer meteor shower.

Cogswell attended the town meeting to discuss the restoration of the old clock tower.