This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Glass applicators for radium emanation . Glass applicators for radium emanation Knox Robert Radiography and Radiotherapeutics Radiotherapeutics Macmillan author PDUS PDold Original upload log en Jacopo Werther en Glassapplicatorsforradiumemanation Brianshapiro bytes no Summary Glass applicators for radium emanation Knox