Stoney, Florence Ada (1870–1932), radiologist, was born in Dublin, second daughter of George Johnstone Stoney (qv), scientist, and his wife Margaret of Parsonstown, King's Co. (Offaly), sister of George Gerald Stoney (qv), engineer. She was educated at home and at the Royal College of Science. As women were not permitted to study at TCD, she pursued her medical degree at the London School of Medicine for Women and received honours in her MB (1895) and B.Sc. (1896) and her MD (1898).
After thirteen years as a consultant radiologist in London, she offered her services to the War Office at the outbreak of the first world war. Her offer was declined, so she organised a surgical unit staffed solely by women, of which she was chief medical officer and radiologist. The unit reached Antwerp in September 1914 and established a 135-bed hospital in an abandoned music hall. When they were bombed out in October, they proceeded to set up a new hospital near Cherbourg and worked under the auspices of the French Croix Rouge. This second location was a medieval château, which required improvisation and ingenuity to transform it into a hospital as initially it lacked water, heating, sanitation, and electricity, which was subsequently generated using a local stream to power the lights and x-ray machine. Stoney remained there until March 1915, when she became one of the first women doctors to work full-time for the War Office, being appointed head of the radiological department at Fulham military hospital. While at Fulham, she was a recognised specialist in locating bullets and shrapnel and provided consultations to over 15,000 patients, many sent from other hospitals.
After the war she established a private practice in Bournemouth and served on the staffs of two local hospitals. On retirement (1928) she travelled to India, where she studied osteomalacia and gave advice on ultra-violet light installations for hospitals. Among her publications were papers on the x-ray treatment of exophthalmic goitre, fibroids, Grave's disease, and soldier's heart, and on the use of ultra-violet light in the treatment of rickets and osteomalacia. She received the 1914 Star for her work in Antwerp, and an OBE on demobilisation in 1919. In recognition of her professional achievement, she was awarded the Diploma in Medical Radiology and Electrology (Cantab.) in 1920. Never married, and always of weak health, she died 7 October 1932, aged 62, in Bournemouth. Her funeral was on 11 October at Golders Green crematorium, London.