To Professor Simpson, of Edinburgh, in reply to his letter to Dr. Collins, on the "Duration of labour as a cause of mortality and danger to mother and infant" : second letter / by Robert Collins, M.D.

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To Professor Simpson, of Edinburgh, in reply to his letter to Dr. Collins, on the "Duration of labour as a cause of mortality and danger to mother and infant" : second letter / by Robert Collins, M.D. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.