[Report 1898] / Medical Officer of Health, Sheffield City.

  • Sheffield (England). City Council
Date:
1898
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1898] / Medical Officer of Health, Sheffield City. Source: Wellcome Collection.

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    f (a) Y early number of observations, each of one hour's duration. [(b) Average number of minutes of Black Smoke. ]V°of Observations Minutes