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
l-Astionotiical
2-Aiiaaft
3-Ujht Phenon.
(•Birds
5-CloudJ, Dust, etc.
6-lnajffic Info.
7-Pjycholopcal
t-IMuxran
9-Otfier
Total
Evaluation
0-Balloon
1-Astmoaical
2-Aircraft
R i g t i t Phenoa.
4-Birds
5-Clouds, Dust, etc
5-lnsuffic Info.
7-Psychological
Hjntomm
9-Ottier
Total
Evaluation
0-Balloon
1-Astronomical
2-Aircraft
3-Light Phenoa.
4-Birds
5-Clouds, Dust, etc.
6-lnsuffic Info.
7-Psycnologiol
8-Unkjxmn
9-Ottier
Total
7%4/-
Number
Certain
g
10
2,
0
0
t
0
13
I
4S
r/ftfi
Certain
/2,
2/
//
0
D
S
a
5~3
/
III
Doubtful
/ £
//
/
0
0
p
z.
0
J9
£
.0
00
7-0
/•7
176
7,0
19./
Percent
Doubtfu
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7O
'4s
00
0C
0-0
of
0.O
0.0
20.9
Total
27.0
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ft
00
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70
U
27.0
70
too.
77-
4T(0n>
V
Number
Certain
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9
67
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4. 2.
0~7
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Percent
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0.0
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744
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74
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0(.
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0.0
0.0
0-0
0.0
{Si
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Total
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2.
Doubtful
£
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/
0
0
0
0
0
¥
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Total
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S
/
0
¥
3
2-t.
Percent
Certain
S.g
/sr¥
3.X
0.0
0.O
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3.g
/IS
.?.&
Us
Doubtful
77
Jg
0O
00
0.0
MA
/s-4
?g.G
Total
(/•s
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(92
rft
00
/&4
3.2
//•£?
19 z
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sr
Nuaiber
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7
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4/3
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2,
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0
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>//r/
?G//>
Total
f
//
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0
&
?
6/
/P6 S
a/
/A/ 7
5/0/1/ we
Percent
Certain
//•S
fg
'$2
/£
0.0
0.0
f.3
0.0
l¥4
At.
70.4
Doubtful
f . f
/S/
f-g
0.0
0.0
0.0
0.0
•00
13
29. s
/A 7"*
Total
/?$
f?9
/ffl
&0
00
3?
0-0
?4f
¥9
/ft?,
Number
;ertain
S£S.
Doubtfu
7"
Total
Number
Certain Doubtful TotaP
PeiCent
Certain
-•
Doubtful
//I/
6/0/V
Total
PnCent
Certain Doubtful
#
Total
sr?/?r'£6' /> 95
li/}L/)n,t£ 0? Soor* /V/atvesr
Mmber
Certain
/7
J¥
j
S0l
2*9
Doubtful
/7
2/
p-
2
0!
01
/
0
2,
7g
S7~,e<f7~4.
Total
•?</
92
2
0
J4
4.
/0g
7
337
~<5/f
PnCent
Certain
£0
/a/
/L.9
0.0
/0./
0?
32.0
/.£-
76 9
Doubtful
£0
i.Z
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0.0
0,*
0/0
010
(P.3
0,0
0.£.
23/
Total
/00
//.. 1
27,S
03
06
0.0
/a/
/Z
31,0
Nunbei
Certain Doubtfu
xr/e/?;
Total
rS6/c
Certain
« - ^
Percent
Doubtful Total
Number
Certain Doubtfu Total Certain
P e r c e n t
Doubtful Total
249 Report, cited by the archive. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.