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Amelia Soth

Amelia Soth, JSTOR

A black and white drawing of ships flying over a city.

In medieval Ireland, ships sailed across the sky

It's a bird! It's a plane! It's a medieval airship!

Three silver boxes with designs on them.

Incense clocks: How to measure time with fire and smoke

These clocks burn powdered incense along a pre-measured paths, each representing a different amount of time.