A radio episode explores the Indian canoe as a perfected technology. The specific topic of the episode is birch-bark canoes. This episode is part of a series called The Engines of Our Ingenuity.

Further details about the episode are available from the source. The episode number is 1620, and it discusses the Indian canoe in the context of perfected technologies. The source provides more information about this episode, including its focus on birch-bark canoes.

For more details, listeners can refer to the source.