Mineral, calcium sulfate with bounded water

Specification of William Edward Hollands and Nicholas Whitaker Greene : manufacture of artificial fuel in blocks.

Specification of Gustav Alsing : treating sewage, &c.

Specification of Gustav Alsing : treating night soil, &c.

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Gypsum

Works from the collections

Specification of William Edward Hollands and Nicholas Whitaker Greene : manufacture of artificial fuel in blocks.

Specification of Gustav Alsing : treating sewage, &c.

Specification of Gustav Alsing : treating night soil, &c.

Gypsum

Works from the collections

Specification of William Edward Hollands and Nicholas Whitaker Greene : manufacture of artificial fuel in blocks.

Specification of Gustav Alsing : treating sewage, &c.

Specification of Gustav Alsing : treating night soil, &c.

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