Pink flowers, possibly chrysanthemums, arranged in a bottle. Watercolour attributed to M. C. Stopes, 1898. https://www.rawpixel.com/image/13959832/image-flower-plant-artFree Image from public domain licenseThree researchers outside the British experimental hut set up near Ostia to verify the mosquito-malaria theory. Coloured… https://www.rawpixel.com/image/13955164/image-cartoon-person-artFree Image from public domain licenseFlorence Nightingale. Photograph after a painting by Herbert Carmichael. https://www.rawpixel.com/image/14011930/florence-nightingale-photograph-after-painting-herbert-carmichaelFree Image from public domain licenseFlorence Nightingale. Photograph after a painting by Herbert Carmichael. https://www.rawpixel.com/image/13990121/florence-nightingale-photograph-after-painting-herbert-carmichaelFree Image from public domain license