NLM Digital Collections

Search

Search Constraints

Start Over You searched for: Collections Medicine in the Americas, 1610-1920 Remove constraint Collections: Medicine in the Americas, 1610-1920 Subjects Sewage Remove constraint Subjects: Sewage

Search Results

14. Sewage purification

17. The purification of sewage by bacterial oxidation: a study of the natural processes of filth removal and of the means by which their efficiency may be artificially intensified : including a description of works for sewage disposal at Willow Grove Park, Philadelphia, Pa