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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.

rXfLt s t '/0jl /? Balloon
11-Astionomical
2-Airctaft
3-Lijnl Phenom.
4-Bnds
5-Clouds. Dust, etc
frlnsaftic Into.
7-Psvcholoiial
S-Unknowi
9-Otfic
| Total
Evaluation
O-Balloon .
1-Astronomical
2-Aircraft .
3-U|fit Phenom.
4-Birds
5-Clouds, Dust, etc
S-lnsuflic Info.
7-Psycholojical
B-Unkm«n
Wittier
Total
Ai-L.
Number
Certain
_ ^ _
2?
Z
_J2\
0
0
O
Doubtful
0
/*
/
/
0
0
0
0
0
zz
Total
/
/
0
0
/
0
S~9
Certain
3c/
? /
0_0
/•7
A0
00
£2^
Pet Cent
Doubtful
0 0
1-7
0.0
0.0
0.0
0.1)
00
?7.3
Total
30.0
J2A
0.0
00
0.O
0 0
/OO.
/^0 9O- /tie:
r frsrer&te tf/"//!/& S &£>/? /?i.L^ V^/i/&£
Evaluation
O-Balloon
1-Astronomical
2-Aircraft
3-Light Phenoin.
4- Birds
5-Clouds,'Dust, etc.
6-lnsuffic Info.
7-Psychological
B-Unknowi
Wtriet
Total
AV
/III. i/e/ies
Number .
Certain
^L
/2.
/J
£_
_J__
—JL.
/
2Z
S
JJ-
Doubtfu
j »
/t
/ /
0
/
?
O
o
0
/
32-
Total
?7
27
0
2.
2,
^7
22,
4/
/2£
Percent
Certain
/?Z
ZA.
l/J^
0*
0.0
/&£
3.1-
?.?
S.Z
32
/00.
• 0£J£•?
0.0
0O
IA1
/i-7
/0O.
/?.
Number
:ertain
0
O
0
0
0
2.
0
1
0
$-
Doubtful
0
/
0
0
O
O
O
Q_
0
Q
/
Total
/
0
0
0
0
2-
0
/
0
(,
Pet Cent
Certain
2U\
00
0.0
0.0
00
#0
a±
£&
iZjL
??-3
Doubtful
0/P
/i,7
00
0.0
00
0-0
0-0
0.0
0.0
0.0
tf,7
Total
?&
/i-7
0.0
00
O.0
Ml.
0.0
K.7
0-0
/00.
V
Number
;ertain
/r
to
JJ-
J2-
0
..0
_X
JI_
/
AL
Doubtful
t
(•
( '
0
f
£ -
O
0
O
/
2f
Total
/1
/fr
*</
0
/
2
V
/?
(
9/
?<2,
Percent
Certain
/6.S
tt-0
/¥-3
-0.0
111
/ • /
ni
Doubtful
£.2.
U
a-'
00
/,/
2-Z
0,0
#0
00
/,/
26-3
Total
K1
in
2L<{
0-P
/./
2.2
t.t
¥•¥
tf.1
* • %
IPO-
Number
Certain Doubtful Total
Percent
Certain Doubtful Total
198

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.