Map showing the localities of the principal mineral and vegetable products of India and the course of the trunk railways

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Map showing the localities of the principal mineral and vegetable products of India and the course of the trunk railways image 1

Description

Originally printed in 1858, this map of India clearly indicates in blue the region from which a popular colorant was traditionally grown. Can you guess which colorant it is? The map can be found here.

Subject

Indigo Pigment

Language

English