1. C. F. Brush   Vaccination   Electric Motor (AC)   Arc Lamp   Hovercraft   Hint Half-n-half Clue   2. James Harrison, Alexander Catlin   Shorthand   Refrigerator   Logarithmic Tables   Transistor   Half-n-half Clue   3. Otto von Guericke   Electronic Computer   Air Pump   Arc Lamp   Bicycle   Half-n-half Clue   4. G. Ferdinand Von Zeppelin   Electric Furnace   Airship (rigid)   Barometer   Microscope   Half-n-half Clue   5. John Napier   Logarithmic Tables   Fountain Pen   Microscope   Laboratory Gas Burner   Half-n-half Clue   6. Sir Isaac Pitman   Shorthand   Logarithmic Tables   Automobiles using gasoline   Electric Flat Iron   Half-n-half Clue   7. Christopher Cockerell   Hovercraft   Air Pump   Rabies Vaccine   Electric Battery   Half-n-half Clue