In sending up a series of kites to fly tandem, it is best to head the line with a small kite, three or, four feet in diameter, and gradually increase the size until a diameter of six feet is reached for the one sent last. This arrangement makes it possible to hold the upper kites by lighter cord, the heavier kites being reserved for the half of the line nearest to the ground; and thus there is a material lessening of the load to be borne. The first kite should be well up, say five hundred feet, before the second is attached to the line. But after that they maybe sent at closer intervals, sometimes with only a few hundred feet between them--say two hundred feet in light winds, and five hundred feet in heavy winds. Each kite in a tandem should have a length of at least one hundred feet of cord from the main line, and great care should be exercised in knotting fast the individual lines. The best way of starting a second kite, after the first is well up, is to pay out about a hundred feet of cord for the tandem line, attaching one end of this to the main cord and the other to the second kite, which is left lying on the ground back downward. Then pay out the main line evenly until the tandem line begins to lift. As the pendent kite is borne higher and higher, it will swing for a while in a horizontal position; but will presently begin to flutter and sail sideways, and then finally come up more and more, until the wind catches it and it shoots up like a bird into its proper position. In fact, once the first kite is securely up, the others will fly themselves by merely being attached to the main line as described. Of course each fresh kite increases the pull on the main line, and the line must be made proportionately stronger as the tandem is increased. RUNAWAY TANDEMS.