The method and plain process for making pot-ash : equal, if not superior to the best foreign pot-ash published, in consequence of the late encouragement granted by Parliament for that purpose / By Thomas Stephens.

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The method and plain process for making pot-ash : equal, if not superior to the best foreign pot-ash published, in consequence of the late encouragement granted by Parliament for that purpose / By Thomas Stephens. Public Domain Mark. Source: Wellcome Collection.