May 27th
1840 Lars F. Nilson discovered scandium, was born.
1857 Theodor Curtius, a researcher in chemistry of hydrazines and azides; the Curtius rearrangement and characterized benzoylglycylglycine, was born.
1909 Mary Fieser researcher on quinones, natural products, and steroids; coauthored texts in organic chemistry with her husband, was born.