Mary Blade, standing at blackboard

---

Size: 1270px × 1572px
Photo credit: © Bygone Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: -, 1946, 2009, 20th, 20thcenturymid, a2fp, academia, archive, archives, blackboard, blackboarf, blade, century, chalk, chalkboard, chart, class, cooperunion, curve, curvea, engineer, engineering, female, femaleengineer, graph, historic, history, institution, jfjaw-normasmediainsightworld-jeanfarescouture-daring-mankind-heritage, jfjawnormasmediainsightworldjeanfarescouturedaringmankindheritage, mary, maryblade, mathematics, mid, month, photograph, pioneering, pioneeringfemaleinengineering, professor, rotation, school, science, smile, smithsonian, smithsonianinstitution, smithsonianinstitutionarchives, standing, teacher, vintage, woman, women, womeninscience, womensday, womenshistorymonth