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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. 245 …P _/) - 7 P P 3 ?% ToUl •6 'r? g_ 0 70 '0 5L3fy Per Cent . Certain…
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  • p. 258 …9 0 $ / 'i a 2£ -L 43 r/?g(. Certain / / f2> 2. I? ?; • 2 V 1…
/} /& t/flrye/Y
/4V 1-/6J/T /$/(/&J£rA/£ $1
Evaluation
0- Balloon
1-Astionomical
2-Aircratt
J - l i j M Ptienon.
4-Birds
5-Clowh, Dust, etc
6-limffic Mb.
7-Psvcfc>IO|ical
t - I M K M
MlDwr
Total
Number
Certain
If
f
/
0
f
2-
/$-
/
Doubtful
s
74
J
0
0
O
0
2-
3
9-7
Total
7
33
IX.
1
0
0
i
ir
f
i f
Percent
Certain
Mi
O.{\
0.0
Mi
M
17.6
/.x
Doubtful
f.9
/is-
JS
0,0
0.0
0.0
0,0
JLq
00
3.5
3/.?
Total
1.3
Ml
/.x
0.0
0.0
/0.t
Jf-1
i7.i
f-,7
100.
Number
Certain
31
JZ.
*?•
o
I
J2.
f
w
Doubtful
3if
/
0
O
76
Total
£3-
76
x.
z.
'7
(/
•7 ////
- ' /
Per Cent
Certain
JJ..7
47
I7.Z
JLO
0,4
0,1
~Mat
U3
(32
Doubtful
7if
Jhl
J3.t
U
0!M-
0.0
0-0
0.0
0.S
31,1
Total
f.D
Jl.l
u
o.l
70
uM3
fkS
100.
(£>//? '•//VG s ( •
SvMl'/Gtfr 0IY FEASTS'/?
Number
:ertain
/ /
9
£
0
1
1
9
0
J£
3
Doubtful
f
13
1
1
-z-
o?
Total
if
if
I
2.
3
f
p
/ /
3
?0
Per Cent
Ccftflin
I2X
/o.o
00
I.I
I.I
/0.0
00
17,1
33
&.1
Doubtful
S.f
/O. 0
I.I
I.I
7-1
ao
0.0
ao
0.0
Total
£/•'
£l.l
' • (
/o.o
0.0
'7,9
3,3
IPO.
Su/Vi-IQ/tT CM J r/>A/£-
Number
Certain
^ ^
-A.
—$-
$
/
_ ^
r
Doubtful
_JLL
/
J
0
/
0
0
7
Total
If-
3
3
D
1
0
1
0
* * • •
/ f
Percent
Certain
J&i
0.0
0.0
o.o
-C-3
0.0
/AS
63.Z
Doubtful
'0,5
f.3
/f.f
0.0
0.0
0.0
00
00
36.1
Total
/f.g
IS'Z
00
£3
00
S.3
0.0
&.3
/OS
/no.
Evaluation
O-Mloon
1-Ajtronomicjl
2-Aircraft
3-Li Jtit Phenoa.
4-Biids
5-Clouds, Dust, etc
6-lnsuftic. Info.
7-Psycnological
S-Unkno«n
9-Othei
,_ Total
Number
Certain
0
_JL
O\
_JL
0
0
Ooubtfu
/
O
0
/
0
O
0
a.
Total
H
1
0
Q
D
1
0
Q
I
0
7
Percent
Certain
JZL
D.0
0,0
0.0
0.0
Ml
nit
Ooubtfu
f.9
W.3
0.0
0-0
0.0
/H-3
CD
D.0
P.Q
ao
Total
srzt
14.3
AO
0,0
0.0
0.0
6.0
m0.0
m
^/?fC//r£ff r**y /foe*
Number
Certain
J±
L3£
X7
_X
/
0
& ,
3
22,
'//I
3/4-
Doubtful
*1
f?
52.
3
0
0
O
0>
0
6
Total
199
79
f
1
0
&3
?.O
V-73-
PetCoit
Certain
M.
XK
£77
0.3.
47
0.6
/?J
3.0
Doubtful
J7f
/I.O
0.6
0.0
0.0
ao
0.0
A3
33S
Total
f.f
/i-7
t-f
0.%
00
*7
0.6
/f.S
Jk3
100,
Number
:ertain
/
0
0
0
0
JL
_A
3S
Doubtful
a-
/ /
fi-
2-
0
/
0>
/{
Total
/s
ft
3
0
1
/S
0
S-3
P e r c e n t
Certain
Jl
7-r
jUt
-11
JO
M.
0.0
0.0
0.0
66.0
Doubtful
31
?J
AO
ao
ao/1
0.0
3X0
Total
n
3P.1
*7
OJ
0.0
'•f
?&
0.0
{00.
Hunter
Certain
_T
6
3
_ Z
/
_ ^
3
t>
J£L
0
Doubtfu
7
/ 7
3
.?
/
0
0
0
Total
12-
?-3
6
3
2~
J$~
3
7P
Per C a t
Certain
-11
uA3
Jilt
AO
0
Doubtful
/0.0
A3
/.If-
0.0
00
#3
Total
/7.I
u£7
£1
0,0
Ml
A?
XJ.4
43
/to.
Evaluation
D-8alloon
1-Astranomiul
2-Aircraft
3-Lijrit Pfienon.
4- Birds
5-Clouds, Dust, etc
S-lnsurfic. kite.
7-Psychological
B-Unkmon
M t h e r
Total
Nunber
Certain
/
_L
0
0
JL
__&
0
/0
Doubtful
/
0
1
0
C>
0
0?
z
Total
2-
JL
0
0
0
2
(?
4-
0
fJL
Percent
Certain
%3
U.7
ox
OP
o7o
-M
HI
Doubtfu
0.0
7.3
0.0
0.0
AO
0.0
0.0
0,0
O.o
/(.7
Total
/*.£
AO
0.0
a. 7
0-0
31,1
0,0
/oo.
Mr- SrAr^p
Number
Certain
m
Z91
252
J3
_ £
X35
31
U-7li
ieos
Doubtful
J04
J-01
'71
//
/P
0
3
P
J-l
Total
Iff
SO/
34
XI
it
z?s
3H-
/Of-
Per Cent
Certain
IA
IU.
n. 1
i.l
IA
M
/<)•<}
JA
\VL
Doubtful
1,7
f-%
0.3
0.5
(11
0.0
1°
X.I
Total
/3.S
W.3
11-1
\.b
1-0
41
16.1
l.S
Ul
lot.
Number
Certain Doubtful Total
P e r c e n t
Certain Doubtful Total
Number
Certain Doubtfu Total
Per O u t
Certain Doubtful Total
210

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.