Documents / Report
This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.
“R.G.”3 pages
Evaluation
0-Balloon
' I-Astmrcmical
2-Aucrift
3-Litfit Phenom.
4-Bi'ds
5-Clouds, Dust. etc.
6-lnsuHic. Info.
7-Psvdtlofical
«-Unkno«n
9-OHw
T O I J I
Au.
Number
Certain
0
T
0
/
t
o
/(.
3
Doubtful
3,
o
(
o
e
/
C
o
3o
Total
8
o
I
/
8
/
/c
J
99
Per Cent
Certain
ao
3S.4
Ad.
0.0
JJ-
4.0
3o
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Zo
0.O
/.a
0.O
/•*
a.o
av
303
Total
Z°
s,i
00
/•o
/ • »
8-1
/.0
Jf
/off.
/??/ '
Number
Certain Doubtful Total
Per Cent
Certain Doubtful Total
Ji4f
Number
;ertain
0
a
0
_£_
o
g
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0
J."
o
Q
a
o
o
a
o
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Total
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o
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o
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e
0
2
0
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Certain
0,0
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0.0
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0.0
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Number
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o
0
o
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el
O
O
o
o
o
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Total
0
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p
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A
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me
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0.0
0.0
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Evaluation
O-Balloon
l-Astmnoniul
2-Aircrafl
3-Lijtit Ptienom.
4-Birds
5-Clouds, Dust, e t c
6-lnsurfic. Info.
7-Psychological
B-Unknomn
9-Other
Total
/9fO
Number
Certain
'O
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O
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0
g>
9
Per Cent
Certain
aa
£^-
ff.O
0.0
9.0
a.?
a.0
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0.O
0.0
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0.0
0-a
/oo.
Number
Certain
0
0
/
0
2.
/
S
Doubtful
6
J
0
_ .»
0.0
Total
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S~o.o
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a,a
0.0
0.0
0.*
& *
/0O.
Number
:ertain
O
c,
0
t-
7
>
Doubtfu
X
/°J.
J
0
A -
/:4
0.0
'7.1
Jo
in
Doubtful
3.O
Jo
0 0
/••"
i
jr
0
o
JL
o
IX
232
Total
/o3
Ko4
/fS
AS
/ /
o
/34
/4
13 C
4(,
231
/
SfA/f
ALl/A
ffea
PerCent
Certain
f-i
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{ML
So
/Ll
/ • *
Jii.
A-L
Doubtfu
Vr?
/o. 7
/ • /
££O
/9
Number
Certain
7
__s2-
l_
0
S-
i
J
3X
Doubtful
J
/o
1
I
O
O
o
o
J
(tcal
S-UnknoM
V O t t w
. Total
Number
Certain
fl
/x
9
0
0
0
/S
0
/4
3
Doubtful
2
4
J"
0
0
p
0
0
a
0
II
r T o t a l
/#
/(,
14
a
e
0
/3
0
/4
3
7O
Percent
Certain
J/4
w
41
0.0
0.0
4.0
OA
0.0
Je.o
43
Doubtful
*1
r.f
aa
'0.a
fa
0.0
0.0
0.0
fie
/*7
Total
/f-3
20.O
0.0
a,0
/ / .O
/?*
/ • * -
su
41
/S0.
/9S2
Number
>rtain
H\7/
/•r
J
0
-23-
/£
37C
Doubtful
32
J4
i3
7
J"
0
a
z
9
/So
Total
7T
//(.
A?
C
0
77
9
9/
Jf
SJ6
Per Cent
Certain
ITS
/*J1
/<>•/
*>.(,
0.0
MA
/7i
i.o
1/.S
Doubtful
/Zo
/.$
?c
0.0
0.a
a, 4
f.a
/•7
Total
/4-i
Z».e
W
4>
/ • *
a.o
/{•(.
n
4-1
/oo.
Number
Certain Doubtful Total
Per Cent
Certain Doubtful Total Report, cited by the archive. The PDF is mirrored here; the original link is under it. 309 pages are in the text index: search them above, or from the library's search.