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. 4 …in the Strategic Areas of the Central Midwest Region ' 50 Figure 35 Comparison of Evaluation of…
  • p. 58 O Dayton 144 object sighting! " 7 Balance of Central Midwest Region 164 object sightings FIGURE 34…
  • p. 60 CJ1 ro o San Antonio 36 object sightings Balance of South Midwest Region FIGURE 36 COMPARISON…
  • p. 112 …Evaluation of All Sightings in the Strategic A r e a s of the Central Midwest…
  • p. 113 …Evaluation of Object Sightings in the Strategic Areas of the Central Midwest Region 252 Table A237…
fti-
Evaluation
f> Balloon
1 1 - Astronomical
12-Aircraft
3-Light Phenom.
I-Buds
5-Cloudi, Oust, etc
S-lnsuflic Into.
IPsycrotofial
8-Unkmm
»0the.
Total
Evaluation
O-Balloon
1-Astnnomical
2-Aircraft
3-Light Phenom.
4-Birds
S-Clouds, Dust, etc
S-lnsuffic kilo.
7-Psychological
8-Unkno«n
Wither
Total
Certain
/JL
JX
3
e>
/ft
ALL YgAHS
Number
Doubtful
/
/3
1
o
3.
o
S3
Total
*r
#4
4
/
S
JT2
7
X3\
Certain
u
Ad
00
f i
77.1
>erCent
Doubtful
3.3
fA
04
o4
0?
f.0
0J
00
Total
)\A
It A
1.1
{)•$
U
1.1
A
o

O
4(r
/o
/4S
J7
/9
Number
Certain
J
^ _
J~
O

Total
3
s-
7
&
e>
0
3
tp
//
4
3S
Percent
Certain
Ac
MI
to
t o
0.O
4.S
J?3
0.0
UA
Y/FA
Doubtfu
4i'
9/
O.0
0O
0~C7
0O
O.O
o.o
I3.L
Total
9-0
7J.7
t.0
0-6
xi. 7
•/.s
37 3
0 0
JO0L
0t
Number
Certain
J
0
/
e
0
I
/
L-
Doubtful
O
o
0
o
o
o
o
/
a
O
/
Total
0
1
1
o
o
I
Z
(,
1
/£-
fl
Certain
&.0
(1
in
£>o
4&O.
6,1
93.2
Per C a t
Doubtful
0 0
0.O
0.0
0.0
O.o
0.O
fi 0
1.7
p.o
O.o
17
0/p
Total
0.0
67
6.7
6-6
M
io-0
4-7
(00.
/ 9" J~/
Number
Certain
f
a
o
0
0
2
/

It.7
/.ft
6,9
p.o
t-1
1.1
l/lfr
f* Per Cent
Certain
tc
/4\
00
0.0
0.0
UL
0.0
3/4
J-.7
7/4
Doubtful
00
t(4
f/-4,
O O
0 0
0' O
0-0
0t>
a o
S~.7
Total
I*.3
'•0
An
? .O
4/.1
f.7
77.4
Doubtful
o.o
£ /
Per Cent
Certain
SO
i£JL
S.O
O.o
0.0
IO.6
o.o
Total
2
Ze.o
a£.o
S,0
# • *
10.0
0.0
10. 0
ao
)OD.
/ f^JL-
Number
;ertain
//
7
^ /
O
a
—2J
4-
//6
Doubtfu
J
7
3. Z
/
O
1-
o
J
O
0
3C*
S/&X7-/A/G 5
Total
c T . ^
Li
JO
a.o
0.0
£•£
¥/9
9.7
/fSV
Number
Certain
/
7
-A
1
a
o
a
j .
£21
Doubtful
O
0
o
o
0
o
1
o
0
Total
/
7
y
1
0
0
o
1
7
-2
A4
Certain
d2
21.2
/C-7
4x
0,0
0.e
0.0
*.o
S?-2
9tf
'er Cent
Doubtful
fo
f.O
4-x
o.o
ff.o
0. o
O.O
4-z
O.O
0.0
?.3
Total
yp
#72
&.?
$.0
0.0
2.
Jo
Doubtful
-£2L
/f.2
3.o
( • i
Jo
(0.0
O.0
o.o
o.o
3o
Total
£0
Z7.3
M-l
?•/
CO
60
/X.I
0.6
H/.3,
/oo.
Per Cent
Certain
3.1
ML
i l l
J.i
os
O.o
t.1
U
2X9
3.1
731
Doubtful
4 f
f.0
/I.2.
_oj.
O.G
0.0
0.0
0.1
O.O
0.3
Al.4
Total
7 If?
r.f
i?
y.0
/os.
Doubtfu Total
£S
'*4
Number
Certainj
O
X
&
o
o
f
A/
Doubtfu
o
y
o
1
o
o
o
a
o
AJ.
Total
0
/$
a
/
0
3
I
8
1
43
Certain
'?
Certain
/HO
4.1
00
0.0
0.o
to
13
lU
4a
Percent
Doubtful
0/zret
' //0.
Per C a t
Doubtful
0.0
$7 Z
/M+
O. O
J.3
0.0
O.O
O.o
0.0
0.0
f/jZ
Total
-0
Total
i/.f
0,0
7 /)
/*,'&
/oo.
Number
Certain Doubtful Total
PtrCent
Certain Doubtful Total
208

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.