From a photograph taken from a kite by Mr. W.A. Eddy, showing Murray
and Warren Streets, New York City, as they run west from Broadway.]
Among many other curious things about the wind observed by Mr. Eddy,
is the fact that the night winds are by far the steadiest and most
satisfactory for kite-flying. On this account much of his work with
kites has been done in the darkness, although he uses lanterns on
the lines to assist him in locating the kites. It has also been
demonstrated that the force of the wind increases steadily as the
distance from the earth increases. Archibald proved this conclusively,
by suspending a series of wind-measuring instruments at intervals
along the main line, their registration showing almost invariably
greater wind pressure at the higher altitude. Mr. Eddy has furthermore
noted that, while the early morning wind is usually very light at the
earth's surface, it is almost invariably good aloft; and he has again
and again verified the well-established fact that all clouds herald
their approach and are accompanied by increased wind velocity.