not get sufficient power to achieve flight, but he went on
experimenting in various directions, and left much data
concerning his experiments which has not yet been deemed worthy
of publication, but which still contains a mass of information
that is of practical utility, embodying as it does a vast amount
of painstaking work.

Penaud and Moy were followed by Goupil, a Frenchman, who, in
place of attempting to fit a motor to an aeroplane, experimented
by making the wind his motor. He anchored his machine to the
ground, allowing it two feet of lift, and merely waited for a
wind to come along and lift it. The machine was stream lined,
and the wings, curving as in the early German patterns of war
aeroplanes, gave a total lifting surface of about 290 sq. ft.
Anchored to the ground and facing a wind of 19 feet per second,
Goupil's machine lifted its own weight and that of two men as
well to the limit of its anchorage. Although this took place as
late as 1883 the inventor went no further in practical work. He
published a book, however, entitled La Locomotion Aerienne,
which is still of great importance, more especially on the
subject of inherent stability.

In 1884 came the first patents of Horatio Phillips, whose work
lay mainly in the direction of investigation into the curvature
of plane surfaces, with a view to obtaining the greatest amount
of support. Phillips was one of the first to treat the problem
of curvature of planes as a matter for scientific experiment,
and, great as has been the development of the driven plane in
the 36 years that have passed since he began, there is still
room for investigation into the subject which he studied so