https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14006407Edit ImageSaveSaveEditCropCustom TextScience: various types of forced-air calorimeter. Engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 877 x 1200 px | 300 dpiLarge JPEG 2274 x 3111 px | 300 dpiFree DownloadScience: various types of forced-air calorimeter. Engraving.More