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.

Open the PDF at page 201 Original source ↗ 
Enlwtiori
0- Balloon
: 1-Astronomiol
2-AircraH
3-Light Ptienom.
4-Bircb
S-Clouds. Oust, etc
frlnsuffic Into.
7-Piyeho logical
a-UnkMM
M t h w
Total
Certain
2.
2.
^
O
0
0
5~
0
• /U3S- wr/t.
AIL Ye/net
Number
Doubtful
2/
2.
/
/
0
0
0
0
Total
2
/
'/
0
/
0
r
a
Certain
5"/f
2.1
00
00
/•?
00
&7'
"erCent
Doubtful
0.0
2ZA
JluL
\00
0-0
0.0
J2J1
Total
#/£
/•3
0.O
/.3
0.0
(?•(?
/00,
Certain
>M (A
r a /^ /?*?J£ c
/9V7
Number
Doubtfu
v
ToUl
V
PerCent
Certain
(1.
V
Doubtfu
S/6 -?vr/
Z T
Total
o/c^
Certain
a.
0
0
0
A
Number
Doubtful
0
0
0
O
0
0
0
0
¥
Total
0
f
0
0
0
0
2,
0
/0
f
Certain
00
00
0.0
0.0
0.0
20 0
0.0
51 Cent
Doubtful
00
0.0
0.0
0.0
0-0
00
00
ToUl
(?•(?
$00
0.0
0.0
0.0
20O
ao
/ao.
Certain
0
a
0
0
•0
0
/ •
Number
"Doubtful
0
0
/
0
0
0
0
0
Total
0
C
0
0
• (
P
0
0
0
7
'?
Percent
Certain
0.0
/V?
JL0_
0.0
J2-£.
p.0
ao
Doubtful
0.0
00
0.0
0.0
0-0
0 a
$£7
Tom
£0
ZS.7
a.0
0.0
00
0.0
0.0
/0O.
Evaluitkm
0-Balloon
1-Asbonomical
2'Aircraft
3-Lijht Ptienon.
4-Binb
S-Clouds, Dust, etc.
frlnsuKic Info.
7-Psychologicil
8-llnkno»n
9-0thei
Tort
/9^0
Numb«
Certain
• . • •
/
0
..-
Percent
Certain
&£
0.0
ao
0.0
£J2_
0,0
0.0
00
/mo
Doubtfu
0-0
0.0
00
0(?
0.0
0.0
aa
0.0
0.0
0-0
0.0
Total
£0.0
£0.0
00
fr0
0.0
0-0
0-0
0.0
00
0-0
/0O.
rfs/
Number
Certain
7
_jl
0
.
0.O
'00.
/9SZ.
Number
lertain
_ ^ _
i.
0
0
0
/
(?
s
0
Doubtful
0
/ /
- Z
/
__i2_
O
0
O
0
0
/UnrunMi
9-Other
Total
Certain
. 2 6
/3
/A
0
/
0
(3
2c
.?
Z02.
Number
Doubtfu
s/
/ • ?
/J
/
2*
0
0
fin.
Total
30
2&
2?
I
2
/ft
Certain
S)
' 0
O
0
0
ft
2
0
2,
3£
Number
"DoStfuil
/ ]
0
0
0
0
' 0
0
0
0
/
Total
0
0
0
0
(?
2.
0
/
&
'7 PerCent
Certain
£0_
0.0
0.0
0.0
0.0
££-
0.0
£?
g£3
Doubtful
00
0-0
0.0
0 0
0,0
0.0
0 0
0.0
0.0
ft-7
Total
0.0
0.O
0.0
0-O
0O
00
us
/i 7
Zoo.
Certain
£
?
0
0
t?
/
/
*-£/
Number
Doubtful
0
(1
0
0
0
0
0
0
O
O
0
vr/
at?
0.0
0-O
0.0
0.0
27.3
Total
213
/ft.Z
0.0
00
(?.O
?,/
0.0
0.0
/0O.
/?£-/
Number
:ertain
_ 2 J
0
0
O
O
z
0
1
0
Doubtful
0
/
OJ
0
0
0
0
0
0
/
Total
2,
/
0
0
0
0
z
0
/
0
Per Cent
Certain
Ml.
0.0
AiL
£4-
££L
42-
211
J2£-
££-.
Doubtful
(?,0
M.7
0.0
0.0
(P.0
a.0
7
00
/00.
Number
;ertain
/s~
-J2.
0
0
_JL
20
/
Doubtful
J
f
/(
/
/
0
0
0
/
Z/,
Total
/<?
(7
2V
/
/
Z
S
</
20
/
97
Per Cent
Certain
/£.?
/3.V
0,0
££-
(2JL-
20.0
/.0
Doubtful
J.7
f.2,
//• s
/•0
/•a
£./
0-0
0.0
0.0
/•0
Total
/7t
2</-7
/.<?
/•a
2/
$2.
V./
20i
l-o
/eo.
Number
Certain Doubtful Total
PerCent
Certain Doubtful Total
194

Cited by

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.