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Project Blue Book Special Report (second copy)

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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…
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Evalmhon
:fr Balloon
I'Astmnomical
2-Aircraft
iJ-LijM Phenom.
4-Birds
S-Clouds. Dust. etc.
6-lnsuflic kilo.
7-Pjyda logical
S-Unknon
Wttiet
Total
Number
Certain
0
6
0

8
Doubtfcil
O
2
0
0
0.
u
0
|ical
S-Unknofl/ £~
Number
Certain
?
0
0
I
0
1
Q
Q
Q
0
3
Doubtful
0
Q
0
o
' 0
0
0
0
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0
0
Total
7
0
0
0
/
0
0
9
0
'5
P a Cent
Certain
66.1
0 0
0.0
Q.O
00
33.1
0.0
0.0
0.0
1.0
109.0
Doubtful
00
Q.O
0.0
9.9
0.0
0.0
O.I
Q.O
OJ
0.9
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Total
U.l
9-0
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0-t
0.0
rU
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0.9
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Number
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0
0
0
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2
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0
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3.7
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3.7
70. f
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3.7
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1 f
0.0
3-7
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0-0
t.e
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Total
US
2f.$
217
3.1
3.7
1.0
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0.0
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0
7
1
0
0
0
1
0
0
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1
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0
a
0
0
0
1
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t2
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0
0
1
0
0
1
1 0
sr-
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Certain
0.4
10.0
10.0
0.9
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11.0
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0.0
10.0
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19- 0
no
16.0
t.o
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0-0
0-0
0.0
Q-t
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Total
28.0
H9.0
10.0
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0.1
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Q.I
16.0
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0.0
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33.3
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33.3
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0-0
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111
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33.5
111
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3
/
/
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0
1
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0
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1
0
9
1
0
•20
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5.0
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9.0
20.0
0.0
19.0
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06.0
Doubtful
IS.O
IS.O
0.0
(1.0
0,0
0.0
0.0
Q.O
0.0
15.0
Total
30.0
20.0
{.0
9-°
/O.O
0.0
20-0
0.0
lO-O
0-0
/OO.
Nunber
Certain
/
1
H-
0
0
0
I
0
0
I
I t
Doubtfu
1
0
0
0
a
0
0
a
0
3
Total
3
8
H
0
0
0
1
0
0
1
f l
P e t C e n t
Certain
£ 1
HI.7
0.9
0.0
0.0
M.
0.0
m
Doubtful
IIJ
*•?
0.0
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0-t
0,0
0.0
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$0
0,0
n.6
Total
/7-7
Vf.1
234
OJ
9.1
C9
0J
6.0
S.I
/if-
Number
Certain
2
_JL
c
0
0
0
3
0
JL
JL
IS
Doubtfu
0
1
0
Q
0
O
O
O
O
7
Total
•1
1 0
1
D
0
0
3
0
2
Per Cent
Certain
9.3
Id.
JJL
0J
0J
0.1
17. S
0.0
IS.O
624
Doubtful
0.0
33-3
4A
0-0
o,-o
'0.6
d-9
(I'O
0.0
O.o
37.5
Total
S.3
- ^
9,0
0,0
0.0
/2.S
4,0
t.3
/CO-
118

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.