MPG.eBooks - Search Results - "Mining"

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By His Majesty's royal letters patent. An air machine

by White, William
Published 1790

Subjects: “...Coal-mining machinery / Early works to 1800...”

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Extracts from the reports of the Royal Humane Society : with certificates, letters, &c. which fully evince the utility of an air machine, OR Patent Ventilator; invented and sold by...

by White, William
Published 1794

Subjects: “...Coal-mining machinery / Early works to 1800...”