A lady asks a pharmacist about his enlargening potion; he displays the bump on his head as proof of its efficacy. Process… https://www.rawpixel.com/image/14000085/image-paper-cartoon-faceFree Image from public domain licenseChinese woodcut: Qigong exercise to regulate blood vessels https://www.rawpixel.com/image/13995955/chinese-woodcut-qigong-exercise-regulate-blood-vesselsFree Image from public domain license