Documents / Report
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.
“Roe”1 page
1 • "•
1 Evaluation
'o-Balloon
1'Astronomial
2-Aucraft
3-Lljnt Ptwnom.
«-Buits
S-Clouds, Dust, e l c
S-lnsuflic Wo.
7-PsTdatoral
B-Unknon
3-Othei
Total
Numbei
Certain
Doubtful
if
35
0.0
0?
0-0
00
0.0
00
3.S
S3.0
ToUl
/7 ^
//•3
0O
00
l-t
/P0,
/£C>
Certain
-21.
-2£.
__^2_
^
(_
-£.
Number
Ooubthil
z
S2
0
ri
0
0
.. 0
60
Total
/ * •
p
0
- ^
/5
/Ys
Percent
Cotain
4J-
/0.3
0.0
0.0
U.0
0.7
/&• %
? */
st 7
Doubtful
/•Y
3s:S
Y/
00
00
00
0-O
0,0
00
Y/-3
Total
44
po
,0./?
1)0
//•0
0-7
/P-3
3Y
/00.
I
Evaluation
O-Ballow
1-Astnnomical
2-Ai rcraft
3-Lijtil Ptionm.
4-Burh
5-Cloods, Dust, etc
frlnsuflic m h .
7-Psycfoloiical
8-Unknom
MOW
Total
/9
3/'
ToUl
2/6
2 10
2V0
/t
0
/0
(03
200
Yg
/0?9
Pelo|ical
t-Unknow
»-Other
Total
-• /)77 /VI/M8
i/#r/
70r/>t
Certain
'7
6,
4
0
0]
3
y
Number
Ooubtfu
^ /
LL
ZL.
0
0
0
O
r
ToUl
3/
if
7/
0
0
/?
0
0.0
(?.(?
J2JZ.
/0.0
0-0
%>•/>
/o.o
/?&
Number
:ertain
_£_
__J2_
a_
..£>.
/
/
Ji_
Doubtful
0
/?
o
&
0
a/?
JJL
00
00
50-0
50 0
/WO
Doubtful
0-0
0.0
P.0
P0
(?-0
0-o
0.0
00
0-0
0.0
00
Total
0-P
0.O
00
0-0
0O
0.0
00
0.0
goo
66.0
/0O,
/9S-2,
Number
;eitam
/4
2.
So
3
0
0
'7
3
3/
4
W
Doubtful
/</
2
0
0
0)
/
0
0
5 /
Total
2ft
f
ft
0
0
/7
y
3/
Y
/6S-
Per Cent
Certain
?0
/•3
/9.4
/•?
J20-
J2^0
//.0
AS-
20.0
2.6.
if./
Doubtful
9-0
,?9
/#,/
[3
00
0-O
{2.0
00
0.0
0.0
32?
ToUl
62
375
3.2
0.D
fl.o
//.0
20-f,
2C
/0O.
Numbei
Certain Doubtful Total
Pei Cent
Certain Doubtful Total
c
150 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.