is then free to tilt up and trim
the kite to varying pressures independently of the ascent of the kite as a
whole. When the bottom box also is connected to the string it is a somewhat
risky business sending a kite up in a high wind, as in the earlier part of
the ascent the kite is held by the double bridle fairly square to the wind.
If any doubt is entertained as to the ability of the string to stand the
pressure, the one-box attachment is preferable, though possibly it does not
send the kite to as great a height as might be attained under similar
conditions by the two-box bridle.

[Illustration: FIG. 118.--Box kite with rear wings.]

When one has to attach a string or wire to a large kite at a single point,
the ordinary method of using an eye screwed into the front stick is
attended by obvious risks. Mr. Dines employs for his kites (which measure
up to nine feet in height) an attachment which is independent of the front
stick. Two sticks, equal in length to the width of the sail, are tacked on
to the inner side of the sail close to the front stick. Rings are secured
to the middle of the sticks and connected by a loop of cord, to which the
wire (in this case) used for flying the kite is made fast.

A Box Kite with Wings.--The type of kite shown in Fig. 118 is an
excellent flyer, very easy, to make and very portable. The two boxes give
good longitudinal stability, the sides of the boxes prevent quick lateral
movements, and the two wings projecting backwards from the rear corners
afford the "dihedral angle" effect which tends to keep the kite steadily
facing the wind. The "lift," or vertical upward pull, obtained with the
type is high, and this, combined with its steadiness, makes the kite useful
for aerial photography, and, on a much larger scale, for man-lifting.

The materials required for the comparatively small example with which the
reader may content himself in the first instance are:

8 wooden rods or bamboos, 4 feet long and 1/2 inch in diameter. 4 yards of
lawn or other light, strong material, 30 inches wide. 12 yards of
unbleached tape, 5/8 inch wide. 8 brass rings, 1 inch diameter.

The Boxes.--Cut off 2 yards 8 inches of material quite squarely, fold
down the middle, crease, and cut along the crease. This gives two pieces 80
by 15 inches.

Double-stitch tape along the edges of each piece.

Lay the ends of a piece together, tapes inside, and stitch them together
half an inch from the edge. Bring a rod