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Across 2. was a pioneer in the chemical synthesis of medicinal drugs such as cortisone, steroids and birth control pills 5. His innovations in refrigeration brought great improvement to the long-haul transportation of perishable goods. 7. chemist and agriculturalist who saved the South with his studies of the peanut 9. created inventions, such as the ultraviolet camera, which was used by NASA in the 1972 Apollo 16 lunar mission 11. Invented America's first fully functional clock 12. Second African-American to receive a patent for a corn planter 13. was the first person to develop a working model of a steam engine for a war ship. 15. best known for patenting the shoe lasting machine, which made footwear more affordable 17. First female self-made millionaire for her successful line of hair care products 20. made the lightbulb more practical and contributed to the invention of the first telephone 21. a nurse, created a home security system she could operate from her bedroom that showed camera images of the front door.

Down 1. Invented the ice cream scoop 3. developed the foil electric microphone in 1962 while developing instruments for human hearing research. 4. designed the heating system for Rockefeller Center and Radio City Music Hall 6. Henry Brown invented this safe metal container in 1886 8. Awarded 59 U.S. patents for the preservation of food 9. his study in bioluminescence led to a potential method of detecting life on other planets 10. his invention of the multiple-effect evaporator, revolutionized the sugar industry 12. His most famous invention was a control unit for the pacemaker. 14. She invented a device that helped many handicapped war veterans feed themselves on their own. 15. He worked on the development of a chemical for hair-straightening. 16. Invented a permanent wave machine that added curl to straight hair and could be used to straighten curly hair. 17. The "Black Edison"; made key contributions to the development of the telephone 18. Notable for his 57 patents most having to do with lubrication of steam engines. 19. Improved the way train cars were hooked up since he lost a limb prior