axes_........................1.66%

_Insufficient_ _data_..........22.72%

(In addition to those initially eliminated)

_Unknowns_.....................26.94%

By using the terms "Known," "Probable," and "Possible," we were able
to differentiate how positive we were of our conclusions. But even in
the "Possible" cases we were, in our own minds, sure that we had
identified the reported UFO.

And who made these reports? Pilots and air crews made 17.1 per cent
from the air. Scientists and engineers made 5.7 per cent, airport
control tower operators made an even 1.0 per cent of the reports, and
12.5 per cent of the total were radar reports. The remaining 63.7 per
cent were made by military and civilian observers in general.

The reports that we were interested in were the 26.94 per cent or
429 "Unknowns," so we had studied them in great detail. We studied
the reported colors of the UFO's, the shapes, the directions they
were traveling, the times of day they were observed, and many more
details, but we could find no significant pattern or trends. We did
find that the most often reported shape was elliptical and that the
most often reported color was white or "metallic." About the same
number of UFO's were reported as being seen in daytime as at night,
and the direction of travel equally covered the sixteen cardinal
headings of the compass.

Seventy per cent of the "Unknowns" had been seen visually from the
air; 12 per cent had been seen visually from the ground; 10 per cent
had been picked up by ground or airborne radar; and 8 per cent were
combination visual-radar sightings.

In the over-all total of 1,593 sightings women made two reports for
every one made by a man, but in the "Unknowns" the men beat out women
ten to one.

There were two other factors we could never resolve, the frequency
of the sightings and their geographical distribution. Since the first
flurry of reports in July of 1947, each July brought a definite peak
in reports; then a definite secondary peak occurred just before each
Christmas. We plotted these peaks in sightings against high tides,
world-wide atomic tests, the positions of the moon and planets, the
general cloudiness over the United States, and a dozen and one other
things, but we could never say what caused more people to see UFO's
at certain times of the year.

Then the UFO's were habitually reported from areas around
"technically interesting" places like our atomic energy
installa