DescriptionIsochronic Passage Chart Francis Galton 1881.jpg
English: Francis Galton's first known isochronic map published for the Proceedings of the Royal Geographical Society, 1881.
It shows the travel times in 1881 from London, United Kingdom to different parts of the world in days. It assumes that there are favourable travel conditions and that travel arrangements over land have been made in advance. It assumes travelling methods of the day within a reasonable cost.
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