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 reign of Nero, and it is therefore generally supposed that Dioscorides was in his prime at that period, and would consequently be a contemporary of Pliny's. It is possible that both authors drew from another common source.

Dioscorides was a native of Anazarbus in Cilicia, a province where the Greek spoken and written was proverbially provincial. Our word solecism is believed to have been derived from the town of Soloe in the same district. The Greek of Dioscorides is alleged to have been far from classical. He himself apologises for it in his preface, and Galen remarks upon it. Nevertheless Dioscorides maintained for at least sixteen centuries the premier position among authorities on materia medica. Galen complains that he was sometimes too indefinite in his description of plants, that he does not indicate exactly enough the diseases in which they are useful, and that he does not explain the degrees of heat, cold, dryness, and humidity which characterise them. He will often content himself with saying that a herb is hot or cold, as the case may be. As an illustration of one of his other criticisms Galen mentions the Polygonum, of which he notes that Dioscorides says "it is useful for those who urinate with difficulty." But Galen adds that he does not particularise precisely the cases of which this is a symptom and which the Polygonum is good for. But these defects notwithstanding, Galen recognises that Dioscorides is the best authority on the subject of the materials of medicine.

It is generally stated that Dioscorides was a physician; but of this there is no certain evidence. According to his own account he was devoted to the study and observation of plants and medical substances generally,