National Geographic : 1956 Aug
Dr. Bell fretted so when the wind was too slack for tests that his wife suggested he tie his smaller models to a galloping horse and haul them aloft. The suggestion delighted him, and on November 18, 1902, he wrote in one of his journals: "Tried it yesterday with small kite. Re sults so promising that we tried three of our large kites today in same way. Found I could study their mode of flight in the air as + Beehivelike Stills Refine Salt Water Dr. Bell reasoned that solar stills might provide drinking water aboard small boats adrift at sea. These tablelike devices expose sea water to the sun. Moisture condensing on glass lids trickles into recep tacles as distilled water. At left, Dr. Bell explains the apparatus to Mrs. Gilbert Grosvenor in 1921. Gilbert Grosvenor 248 Water Is Recaptured + from Human Breath In 1909 Dr. Bell experimented with a simple method to help save lives endangered by thirst. Here one of his workmen breathes through a tube into a bottle im mersed in sea water. Dr. Bell noted that moisture condensed in the bottle. Two hours' breath ing produced enough for a "mod erate drink"-fresh, but not very palatable.