The modern system of flying kites tandem was devised by Mr. Eddy in 1890, although it was hit upon two years later independently by Dr. Alexander B. Johnson, the distinguished surgeon of the Roosevelt Hospital in New York. The tandem system makes it possible to send kites to far greater altitudes than had ever been previously attained. And here the best record is undoubtedly held by one of Mr. Eddy's tandems, sent aloft at Bayonne, on November 7, 1893. Mr. Eddy began to send up the kites at 7:30 A.M.; but, being hampered by light breezes from the east, found he was kept busy until half-past three in the afternoon in getting nine kites aloft. He had paid out nearly two miles of cord, when the top kite, a little two-footer, stood straight over the spar buoy in Newark Bay. The lowest kite, a six-footer, was hovering some distance inland from the shore, on a line from the shore to Mr. Eddy's house (where the end of the line was anchored) measuring fifty-five hundred feet by the surveyor's map. Taking two observations from the two ends of this base line, Mr. Eddy's kite-quadrant showed angles of thirty-five and sixty-six degrees; and these data, by simple methods of triangulation, were sufficient to determine the altitude of the kite, which was found to be five thousand five hundred and ninety-five feet--or something over one mile. The kites were seen by hundreds of persons during the fifteen hours that they remained up, the experiment coming to an abrupt end at ten o'clock that night by the blowing away of the two upper kites in the increasing wind. The escaped kites disappeared in Newark Bay, along with three thousand feet of the line. [Illustration: KITE-DRAWN BUOY. Invented by Prof. J. Woodbridge Davis. This buoy lacks the steering appliances of the one shown below, and travels simply in a line with the kite that draws it.]