1. Automobiles using gasoline   John J. Loud   Lewis E. Waterman   Karl Benz   H. W. Seeley   Hint Half-n-half Clue   2. Barometer   Evangelista Torricelli   James Harrison, Alexander Catlin   Roger Bacon   Nikola Tesla   Half-n-half Clue   3. Nylon   G. Ferdinand Von Zeppelin   Otto   Dr. Wallace H. Carothers   Edmund Cartwright   Half-n-half Clue   4. Internal Combustion Engine   Evangelista Torricelli   Otto   John Napier   Otto von Guericke   Half-n-half Clue   5. Hovercraft   H. W. Seeley   Dr. Alan M. Turing   Robert Wilhelm Von Bunsen   Christopher Cockerell   Half-n-half Clue   6. Galvanometer   Edward Jenner   Nikola Tesla   Andre-Marie Ampere   Bardeen, Shockley, Brattain   Half-n-half Clue   7. Arc Lamp   Dr. Alan M. Turing   C. F. Brush   Dr. Wallace H. Carothers   Kirkpatrick Macmillan   Half-n-half Clue