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Project Blue Book Special Report (second copy)

Internet Archive · 309 pages · text from the file's own layer

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.

/)99
Enluation
0- Balloon
1-Astronomical
2-Aircraft
3-Light Phenom.
4-Birds
S-Clouds, Dust, etc
6-lnsufiic Info.
7-Psrcho logical
S-Unkmmn
9-0 the.
Total
Number
Certain
/
0
0
0
0
0
//
Doubtful
0
0

Total
0
3
1
0
0
0
0
o
o
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Per Cent
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O'O
0.1
0.1
to
-£&
0.0
JLS.
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Ooubtlul
o.o
54,6
o.O
IP
0.0
0.0
00
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Total
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Oo
04
00
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//-30 Sjrtf/v&j
Number
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7
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0.0
115
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0.0
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Evaluation
O-Balloon
1-Astronomical
2-Aircraft
3-Light Phenom.
4-Birds
5-Clouds, Oust, etc
6-lnsuffic Info.
7-Psychological
8-UnknoM
3-Other
Total
Evaluation
O-Balloon
1-Astronomical
2-Aircraft
3-Lighl Phenom.
4-Birds
S-Clouds, Dust, etc
S-lnsutfic Info.
7-Psychological
8-Unknonn
9-Ottier
Total
6/ S£-covp5- S'/^/jycrfs-
Number
Certain
0
0.0
0,0
13
n
/so.
Number
:ertain
0
0
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8
Doubtful
0
0
0
0
o
0
0
1
Total
3
3
0
0
o
0
f
p
2
0
r
PerCent
Certain
333
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0.0
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0.0
o.o
o.o
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0.0
00
0.0
o.o
// /
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33.3
0.0
0.0
0.0
0.0
/ / /
0.0
22.1
0.0
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Number
Certain
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3
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O
o
ft
a
8
Total
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0
0
PerCent
Certain
tc.7
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04

0.0
0.0
O.Q
00
Total
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20.0
6.0
00
00
04
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40.0
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m.
//-30? S^^^MCJ
Number
Certain
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o
1
Total
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e,
PerCent
Certain
~w
221
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0.0
0.0
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t.o
o-o
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16-7
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33,3
o.o
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OJ
U
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9-9
/to.
Number
Certain
0
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a
0
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O
a
0
0
0
Total
0
1
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D
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0
0
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J-
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0.0
0.P
0.0
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00
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00
0.0
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•70-0
30. i
0.0
o&
0.0
0,0
0.0
0.0
fan
Total
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QH.O
9,00
OO
O-o
0.0
0.0
00
0.0
t.o
III-
Evaluation
O-Balloon
1-Astronomical
2-Aircraft
3-Lighl Phenom.
4-Birds
S-Clouds, Dust, etc
6-lnsuffic Into.
7-Psydnlogical
S-UnknoM
W t h e t
Total
6/ -SE-CMCS - S'A/.-Avrtrs
Number
Ceitain
O
-JL
a
o
0
/
g
A.
Doubtful
/
/
/
/
O
0
0
0
0
5
Total
3
/
if
1
0
0
I
/
P
j_
J./
PerCent
Certain
?•'?
O.O
•00
0.9
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o.o
1%/
7CA
Doubtful
f.i
U
1-?
0.0
o.O
0.6
0.0
0.0
Total
mHI
11.\
H-l
on
00
#•?
n
w
n
i/ii.
6 ~3 0 /ty/Af&f'£s
Number
;ertam
•3
-A.
0
0
/
0
3
Doubtful
a
/
3
0
0
0
o
0
0
0
¥
Total
X
5~
0
&
0
/
0
If
r
Percent
Certain
/o.i
t£l
o.o
0.0
6.0
JL2.
0.0
2/.I
ftp
7H
Doubtful
o.o
s-i
/
33. f
csr
7-2
4 0
OO
111
I?
t-l
/(P.
163

Cases discussed

About this file

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.