https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13955173Edit ImageSaveSaveEditCropCustom TextGeography: two rotating discs showing the hemispheres of the earth, fixed to a card giving details of their use. Engraving by J. Emslie, 1844, after himself.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 944 px | 300 dpiLarge JPEG 3228 x 2540 px | 300 dpiFree DownloadGeography: two rotating discs showing the hemispheres of the earth, fixed to a card giving details of their use. Engraving by J. Emslie, 1844, after himself.More