1. Otto von Guericke   Electric Furnace   Logarithmic Tables   Air Pump   Power Loom   Hint Half-n-half Clue   2. John J. Loud   Arc Lamp   Ball-Point Pen   Microscope   Carburettor   Half-n-half Clue   3. Louis Pasteur   Carburettor   Gunpowder   Bakelite   Rabies Vaccine   Half-n-half Clue   4. Otto   Internal Combustion Engine   Stethoscope   Gunpowder   Microscope   Half-n-half Clue   5. John Napier   Jet Engine   Logarithmic Tables   Stethoscope   Arc Lamp   Half-n-half Clue   6. Z. Janssen   Microscope   Printing Press   Bakelite   Internal Combustion Engine   Half-n-half Clue   7. Lewis E. Waterman   Power Loom   Fountain Pen   Transistor   Bakelite   Half-n-half Clue