1. Dear sir, The State Board of Health have been for three years investigating the subject of pollution of streams, disposal of sewage, etc Author(s): Massachusetts. State Board of Health, author. Publication: [Boston?] : [publisher not identified], [1877?] Subject(s): Manufacturing and Industrial FacilitiesWater PollutionSurveys and QuestionnairesMassachusetts
2. My dear sir, It is expected that the next annual report of the State Board of Health will contain a paper by Professor Nichols, of the Massachusetts Institute of Technology, on the subject of filtration of water, both on the large and on a household scale Author(s): Massachusetts. State Board of Health, author. Publication: [Boston?] : [publisher not identified], [1877?] Subject(s): Manufacturing and Industrial FacilitiesPaperWater PurificationSurveys and QuestionnairesMassachusetts
