1. Edmund Cartwright   Submarine   Stethoscope   Power Loom   Logarithmic Tables   Hint Half-n-half Clue   2. James Harrison, Alexander Catlin   Power Loom   Automobiles using gasoline   Laboratory Gas Burner   Refrigerator   Half-n-half Clue   3. John J. Loud   Printing Press   Shorthand   Ball-Point Pen   Jet Engine   Half-n-half Clue   4. Johann Gutenberg   Jet Engine   Electronic Computer   Printing Press   Automobiles using gasoline   Half-n-half Clue   5. Robert Wilhelm Von Bunsen   Refrigerator   Printing Press   Shorthand   Laboratory Gas Burner   Half-n-half Clue   6. David Bushnell   Submarine   Internal Combustion Engine   Electronic Computer   Laboratory Gas Burner   Half-n-half Clue   7. Evangelista Torricelli   Fountain Pen   Shorthand   Barometer   Microscope   Half-n-half Clue