One result of these experiments was to reinstate indigo dyeing as a practical industry and generally to renew the use of those vegetable dyes, like madder, which had been driven almost out of use by the anilines.

One result of these experiments was to reinstate indigo dyeing as a practical industry, and generally to renew the use of those vegetable dyes, like madder, which had been driven almost out of use by the anilines.

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