1. Barometer   Bardeen, Shockley, Brattain   Otto von Guericke   Evangelista Torricelli   James Harrison, Alexander Catlin   Hint Half-n-half Clue   2. Vaccination   Gottlieb Daimler   H. W. Seeley   Robert Wilhelm Von Bunsen   Edward Jenner   Half-n-half Clue   3. Air Pump   Otto von Guericke   Alessandro Volta   Andre-Marie Ampere   William Siemens   Half-n-half Clue   4. Nylon   Leo H Baekeland   Evangelista Torricelli   Roger Bacon   Dr. Wallace H. Carothers   Half-n-half Clue   5. Airship (rigid)   G. Ferdinand Von Zeppelin   Evangelista Torricelli   Sir Frank Whittle   Edmund Cartwright   Half-n-half Clue   6. Arc Lamp   Dr. Alan M. Turing   John J. Loud   Nikola Tesla   C. F. Brush   Half-n-half Clue   7. Microscope   Z. Janssen   John J. Loud   Robert Wilhelm Von Bunsen   Roger Bacon   Half-n-half Clue