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Specification of Jean Marie Letestu : removing fecal and other matters by force of compressed air.

Specification of James Alexander Manning : treatment of sewerage  for the production of manure, &c.

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Precipitation (Chemistry)

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Specification of Jean Marie Letestu : removing fecal and other matters by force of compressed air.

Specification of James Alexander Manning : treatment of sewerage for the production of manure, &c.