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Credit
Lectures on general anaesthetics in dentistry : advocating painless dental operations by the use of nitrous oxid, nitrous oxid and oxygen, chloroform, ether, ethyl chloride and somnoform / by William Harper De Ford. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.