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Across
  1. 3. 9th black person to recieve a phd in math
  2. 4. third black woman to earn a PhD in math
  3. 6. Jr contributor to the Manhattan Project during World War II
  4. 8. contributions to abstract and algorithmic graph theory
  5. 9. First African American woman to earn a phd in math
Down
  1. 1. worked for nasa
  2. 2. First African American woman to publish a non-PhD thesis
  3. 5. made critical contributions to NASA's rocket systems and energy
  4. 6. second black person to earn a PhD in math
  5. 7. building America’s first clock at the age of 24