In copyright
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Credit
The action of the external muscles of the eye and the diagnosis of ocular paralysis : Professor, Elschnig's diagram / by Duncan Matheson Mackay, M.D.Edin., clinical assistant, Royal London Ophthalmic Hospital; refraction assistant, Royal Eye Hospital, Southwark; late house surgeon, Liverpool Eye and Ear Infirmary. In copyright. Source: Wellcome Collection.