Great Inventions Crossword Puzzle

11. Dr. Schlatter was making a new drug when he spilled some on his fingers. He licked his finger and discovered it tasted sweet. 15. Donald Duncan saw a weapon from the Philippines that could be quickly retrieved if the hunter missed the target. The weapon was tied to a string. Across. 3. Coherent light, Gordon Gould, 1958. 4. ................
................