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'Astrommical
2-Aircraft
3-LisW Phenom.
(•Birds
5-Clouds, Dust, etc
6-lnsuflic. mfo.
7-Psycnolo|ical
I-Unkmwn
9-Othe-
Total
Evaluation
O-Balloon
1-Astnnomical
2-Aircraft
3-Lifht Phenom.
4-Birds
5-Clouds, Dust, etc
E-lnsuffic. Info.
7-Psycholo|ical
8-Unknown
M t h e r
Total
Evaluation
O-Balloon
1-AstronomicJl
2-Aircraft
3-Light Phenom.
4-Birds
5-Clouds, Dust, etc
6-lnsuffic. Info.
7-Psychological
J-Unknown
M B i e r
Total
Evaluation
0- Balloon
1-Astronomical
2-Aircraft
3-Light Phenom.
(•Birds
5-Clouds, Dust, etc
6-lnsuffic Info.
7-Psydnk>(ial
»• Unknown
Total
? /
ALL
Number
Certain
j 2
T'-i
11
nsfo
/04,
/rfj'0
Number
Certain
d -
o
O
O
o
2.
3.
0
/j~
fMAt
Doubtfu
O
o
o
o
0
o
o
o
/
/
Total
S
S
-2
J2S
fit
Doubtfu
4.0
/I 0
S>0
a.o
0.0
0,0
O&
• £
Total
V-3
0.0
40
* • #
£.2
/*„•/
/er Cent
Doubtful
0.0
/O0.0
0.0
0.0
0.0
0.O
0.0
0.0
&. 0
/04rf
j
Tota
0,0
0.0
0.0
4.0
4,0
0,0
4.0
0.0
/40.
Number
Certain
3
z.
/
0
0
0
1
0
1
0
/0
l/IT/t
S
Doubtful
0
0
0
•O
O
0
0
O
O
0f
Total
3
3
_ i _
0
0
0
1
0
0
?/
PerCent
Certain
3L7.i
/t.2
SL
0.0
0.0
0.0
1/
0.0
273
0a
fa3
0A
Doubtful
9/
E£TS
/Is,
Number
Certain
/
O
O
O
O
O
O
,
Doubtful
0
0
O
O
O
O
O
Total
/
0
0
O
O
O
O
/
Total
27, &
f/
0.0
0.0
0.0
rtain
a
0
A
0
0
/
t
Doubtful
/
O
O
O
O
a
0
0
O
/
Tota
p
0
0
P
0
0
/0
Per Cent
Certain
J4.0
10,6
0-0
d.O
00
20. i
0#
O.0
/04
fo.e
Doubtful
/0J
00
(?•/)
00
4.0
0.0
0/)
'4
Jjto
20/)
Total
-&6
20 0
4/)
00
04
4ri
a-o
0-0
/00.
Number
Certain
J£-
_^_
0
1
n
134.
LESS
Per Cent
Certain
&£
O.O
0.6
00
4.6
fi.o
AO
S6.6
IOOO
Doubtful
0.0
0.0
a .6
0,0
Ob
0.6
Total
Q,0
fj 0
(.0
fit?
06
t.Q
/oo,
/? S~/
Number
Certain
0
0
0
0
0
0
1
0
3
Doubtful
_j
0
O
O
O
0
O
O
O
1
Total
1
/
/
O
O
C?
O
/
O
4
Certain
•»?/•«
o.o
0.0
00
00
2S.o
O.O
?s.o
Per Cent
Doubtful
O.0
IS. 6
0.0
0.0
OO
0.6
0,0
ZS.o
Total
to'r>
j^.n
*t~,o
00
6.0
i.o
&0-
ts.d
6-0
/00,
Doubtful
3S
0
.0
1
, f
13
r/A/6
T/f/W
Total
00
J*
33.
_ ^ _
0
s
J7
7
2.47
S
PerCent
Certain
/?/./
7.3
t.s
/.L
0.0
0.4
Co
Jj.
/8,6
IL
704
P0i£.
Doubtful
A-4
3-7
4-sr
0.0
U
0.0
c.4
0.0
Jf£
Total
A.0
2 y
$ '?>
V* f
PerCent
Certain
37S
18.i
£.2
0.4
0-0
0.0
£2
0()
it.7
Doubtful
6.x
4.0
041
4-0
6-0
/j..r
Al.
Tota
ff-Y
st
4.0
0.{
'OS,
/ ?. 4 ^
Number
lertain
Sa
f
0
2
-j—
4-
3.
/7
73.
Doubtful
3.1
7
/
/
0
0
0
/
J~0
Total
SI
1 /7
3
2
4
/ r
/J-7
Certain
/i.L
j-f
I)
0.0
2-4
o.l
2,1
(•&•
S.f
Lo.1
5 er Cent
Doubtful
/6..J'
jr.*'
/* L
X4
0.?
0.0
0.0
0 0
o.S
39.4
Total
/a/
110
X.I
/.(*
/• ?
Number
Certain
/
* •
1
—&-
O
O
/
a
a
Doubtful
a
• _j
/
0
0
0
0
0
0
4
Total
/
Jf
A
0
0
—ZL.
1
0
/&
Pel Cent
Certain
£•?
fi.o
0.0
/*.S
#•0.
7~fo
Doubtful
fi.O
/ / /
/ a
t>ro
0.0
o.a
0.0
0.0
0.0
&~0
Total
&JL
0.0
0.0
0.0
/ f f
r.-A
0.0
Number
Certain Doubtfu
r /
M/L£TJ
Total Certain
Per Cent
Doubtful
#00A
Total
Number
Certain
/
r
a
0
C
0
1
1
-£.
Doubtfu
1
O
O
0
O
O
O
O
Total
3
C
2.
0
0
1
0
1
1
/4-
Certain
7.1
0,0
0-<?
00
0.0
7-'
0.0
7'
^4-3
PerCent
Doubtful
14.1
7.1
J4'• i
0.0
i 0
Oo
O.o
0,0
e.o
O.o
/J--7
Total
•?/.?
17-1
0.0
0,0
0.0
7,1
7-f
1/
/oo,
Number
Certain Doubtful Total Certain
"ei Cent
Doubtful Total
207
J 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.