Sarah G. Bagley became the first female telegraph operator in 1846. A women’s rights advocate, she also worked to make millwork safer for women. Children could read an excellent biography of her at: Sarah G. Bagley.
Lucy B. Hobbs
Lucy B. Hobbs became the first woman dentist when she graduated from the Ohio College of Dental Surgery in Cincinnati, Ohio, in 1866. She practiced dentistry for over 20 years. She then turned her attention to politics and women’s rights.