New-York Historical Society (nyhistory.org blog), 2026-10-08 (Investigator, STEP I)

Site: https://www.nyhistory.org/blogs/the-x-rays-of-melville-e-stone-jr (found by Google query "Sinclair Tousey" obituary OR died OR biography) Result: positive.

• The blog post "The X-Rays of Melville E. Stone, Jr." (From the Stacks, 31 Dec 2013) says the Society "holds a small collection of a New York physician's papers", those of "Brooklynite Sinclair Tousey". It quotes an obituary calling him "one of the first men in America to experiment with X-ray machines and radium". [web]
• The collection includes "the typescript of an essay that appeared in The American Journal of Physiologic Therapeutics in 1911, titled 'Protection of Patient and Operator in Radiography and Radiotherapy'". [web] The blog quotes his advice to beginners to test exposures on "a sugar-cured ham" before patients.
• Bearing: this is an archival holding of his own papers (priority 1 and 4) and an otherwise unlisted 1911 paper on protection (claims 1 and 2: dose safety and protecting the operator). Not reached: the Society's catalogue record (call number, extent, whether it holds more than the typescript).