https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13991535Edit ImageSaveSaveEditCropCustom TextPhysics: a magnetic needle [], with logarithmic apparatus (below). Engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 906 x 1200 px | 300 dpiLarge JPEG 2300 x 3045 px | 300 dpiFree DownloadPhysics: a magnetic needle [], with logarithmic apparatus (below). Engraving.More