Hilda Lyon, women in STEM, Henrietta Vansittart, innovation, aviation, nineteenth century, Verena Holmes, Sarah Guppy, twentieth century, Hertha Ayrton, engineering, Constance Tipper, propeller, Beatrice Shilling, industry, and Gertrude Entwisle

electricity, First World War, industry, Women’s Engineering Society, nineteenth century, Katharine Parsons, Alice Gordon, Institution of Electrical Engineers, twentieth century, Hertha Ayrton, engineering, and women in STEM