Documents / Report

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.

  • p. 190 …S £'0/? 'S t r/0fl/ Of- roe M0/ur*/i/as EvaMnon 0-BIIIOM l…
Evaluation
0- Balloon
1-Astnxmical
2-Anciafl
R i | M Phenom.
4-Biids
5-Clouds, Dust, etc
t-ltuuflic * b .
7-Psydiolofical
(Unknown
Hittif
Total
Evaluation
0-Balloon
1-Astmonical
2'Aitcrafl
3-lijtitPhenom.
4-Brnh
5-Clouds, Dust, etc
Unsuflic kifo.
7* Psycho K){iui.
8-Unknoan
W t h e t
Total
Evaluation
0-Balloon
1-Astronomical
2-Aiicnft
3-Lijtil Phenoa.
4-Biids
5-Clouds, Dust, etc
S-lnsaitfic Info.
7-Psychological
B-Unknxm
9-0 the.
Total
*/$£££
Certain
/ >
3
0
0
0
f
/
0
Certain
0
'£•
JL
0
0
0
3
0
2.
76
AY
Number
Doubtful
a
f
^
0
0
a
0
/
/o
ToUl
0
/2
O
0
o
0
/
/
/
is
MAY
Number
Doubtful
—J2-
^U
/
0
0
0
0
0
p
Total
a
7
s~
a
O
o
3
O
-5
2
Certain
0- 0
fo o
0.0
00
0.0
Ie7
i.7
00
31 i
' e i C w t
Doubtful
/?• /
Numbei
Certain
0
uL
O
o
.JL.
0
/
Doublful
L
0
0
0
0
o
0
0
0
&
Total
0
9
O
o
O
O
o
o
1
/o
Ju
Numbei
Certain
/
/0
j>
0
0
0
f
0
0
/
/$
Doubtful
g
0
0
o
O
o
o
f
Total
/
/?
¥•
o
0
0
3
0
0
/
27
F
Certain
ao
30.0
i.O
0.O
O.O
cxo
do
O.b
/O.O
fi.o
ye
Certain
37-0
/ / • /
0.0
o.o
O.0
//./
o.o
O.o
*7
U-7
>ei Cent
Doubtful
O.O
60.0
£>.O
O.O
a.o
o.o
o.o
o.o
o.a
a.o
too
Pet Cent
Doubtful
O.O
S-7
OLO
a.o
o.o
a.o
0.O
Total
p.o
O.O
0-C
0.O
0.O
O-O
a.o
O.o
/o.o
100.
Total
27
UJ,
p/.$
0.0
0.0
O.O
(t-l
0.0
O.0
31
LQ(L_
0GTo&&/£
Number
Certain
/Z-
/)
f
0
0
0
/8
Doubtful
0
3
/
/
$
$
O
0
0
/0
Total
O
/ 7
¥•
/
z
o
/
o
3
0
zx
Certain
a£>
st*
O.O
3L
0/0
3L
O.O
/0-7
O.o
P « C e n t
Doubtful
OJO
/If
J0J_
o.o
0.0
o.o
O-O
oo
3*7
Total
C3.O
/«..*
ft
O.0
3.L
O.O
Ml.
ao
r//t/ as
i
•?£
Number
!ertain
0
0
/?
0
/
/
0
b>
Certain
/
36
/
/
2.
0
.
Total
y33_
SU
/fc
3-3
2.Z
oa
fg
2-2
/oo.
A/0i/£*i/?£
0
0
s
Total
o
3
1
O
O
O
O
2
f
Zl
Pei Cent
Certain
O.O
33-3
*/-$
0.0
0.0
O-O
O.0
-0
Z3
n.0
0.0
S3
/{•7
0.0
9/7
Doubtful
0-0
0-0
00
0-0'
t?
(?-0
ao
ao
0o
JL2_
Tota1
JLL
£O.D
%-3
-isl-
0,0
J2JL
J&J-
00
100-
y4l/&OST
Nun b «
Certain
ff
/ /f
0
0
/
/
Doubtfu
3
ft;
0
o
o
0
/
¥-&
Total
s
9
/
0
o
to
/
&
3
77
Certain
O.o
/i-9
3 9
0.0
O.0
0.O
ft
/•3
7-9
2.6>
V0-2.
"etCent
Doubtful
3.9
7Z
/.s
O.O
o.o
o.o
0.0
o.o
/ • • *
Total
?•?
a?
11.7
/•3
0.O
O£>
fX
/•3
JS-
79
/OO-
Numbei
Certain
0
0
£?
0>
J>
0
Doubtfu
f
0
0
0
0
0
f
Total
a
zo
o
o
o
o
o
o
3
o
Z3
Certain
O.O
47-S
a.o
0.O
ao
o.o
ao
/3.0
O-O)
WJL
PeiCent
Doubtful
O.<0
3?./
o.a
o.a
a.0
O.0
O.0
•o-o
0.O
ao
3f./
Total
0O
Us
0~.0
0.O
0-O
o~.o
do
0<3
/3-0
O.O
/0a
173

Cases discussed

About this file

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.