@njpazdernik.bsky.social
Reposted
2/20/1921 — b. Helen Free, American chemist, developer, researcher, inventor. Co-inventor, dip & read paper strip test, simplifying diagnoses. This revolutionary invention led to home testing kits. President, American Chemical Society(1993), Natl Inventors HoF (2000) #womenshistory #WomenInSTEM #OTD
February 20, 2025 at 3:26 PM
2/20/1921 — b. Helen Free, American chemist, developer, researcher, inventor. Co-inventor, dip & read paper strip test, simplifying diagnoses. This revolutionary invention led to home testing kits. President, American Chemical Society(1993), Natl Inventors HoF (2000) #womenshistory #WomenInSTEM #OTD