1. Dr. Alan M. Turing   Shorthand   Printing Press   Electronic Computer   Bakelite   Hint Half-n-half Clue   2. Bardeen, Shockley, Brattain   Transistor   Laboratory Gas Burner   Carburettor   Microscope   Half-n-half Clue   3. Lewis E. Waterman   Internal Combustion Engine   Power Loom   Fountain Pen   Shorthand   Half-n-half Clue   4. Kirkpatrick Macmillan   Carburettor   Bicycle   Rabies Vaccine   Laboratory Gas Burner   Half-n-half Clue   5. Edmund Cartwright   Rabies Vaccine   Refrigerator   Power Loom   Transistor   Half-n-half Clue   6. Z. Janssen   Printing Press   Airship (rigid)   Fountain Pen   Microscope   Half-n-half Clue   7. Roger Bacon   Printing Press   Barometer   Airship (rigid)   Gunpowder   Half-n-half Clue