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Start Over Formats Manuscript text ✖Remove constraint Formats: Manuscript text Subjects Chemistry ✖Remove constraint Subjects: Chemistry Subjects Obstetrics ✖Remove constraint Subjects: Obstetrics Languages English ✖Remove constraint Languages: English Genre Formularies ✖Remove constraint Genre: Formularies Genre Case Reports ✖Remove constraint Genre: Case Reports Copyright Public domain ✖Remove constraint Copyright: Public domain Dates by Range 1850-1899 ✖Remove constraint Dates by Range: 1850-1899