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.
“Jet Propulsion Laboratory”1 page
Evaluation
0-Balloon
1-Astnmmial
2-Airaaft
3-LijM PlmoiL
4-Birds
5-CloudJ, Dust, etc
S-UMiffic kit).
7-Psyd»lo|ial
S-IMnom
mother
Total
Number
Ccitain
P
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0
P
0
0
0
-JSL
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/
/
0
0
o
0
0
0
o
32-
Total
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0
0
0
o0
/ a
s~
5J
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Certain
ao
/0.2-
-goj
0,0
0,0
0.0
IS
JtSU
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1,7
1-7
0
(?
1
ToUl
/
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3
O
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p
7
0
P n C o i t
Certain
6.f
06
P.O.
t-0
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ao
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7.1
0,0
0.0
00
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0,0
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0,0
0.0
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Evaluation
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1-Astronmical
2-Aircrafl
3-Light Ptienon.
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6
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6
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2.7
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0,0
20,0
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tf.l
240
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Total
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1
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0.6
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0
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Total
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0.0
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Evaluation
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l-AstRmwical
2-Aircraft
3-Ucfit Phenoa.
4-Birds
5-Clouds, Dust, etc
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Total
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71
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3
Per Cent
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0.0
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0,0
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0.0
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0.0
00
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(1.0
0.0
0-0
0.0
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0.0
Total
?.?.?
O. 6
0.0
0.0
0-0
£4-7
o.o
o,o
fl.O
Wo,
Nufflber
Certain
0
2
1
_£_
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$
3
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1
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P
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0
0
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0
c
2
P
P
o
0
13
Percent
Certain
_OJ_
lf.lt
y.7
0.0
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ISJt
0.0
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6/S
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o,o
0.0
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0.0
0.0
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0,0
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tf.lf
0,0
0.0
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A/OL/£rrtfff-/r
Number
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7
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1
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0
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3
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0
0
0
0
0
0
0
Total
3
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0
0
0
1
6
if-
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PerCent
Certain
0.0
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0.0
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0.0
0.0
2.9
0.0
t/.e
t.D
Doubtful
M.I
If-7
CD
0.0
C.D
0,1
ao
op
Gu.7
Total
If-f
Mf
(1,7
0-0
0,0
O.o
7,9
tltf
0.0
J00t
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Number '
Certain
6
0
0
0
1
JL
6
3
XX
Doubtful
0
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0
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o
0
0
r
Total
a
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0
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1
0
a
?
J-7
Pet Cent
Certain
7.4
pi 2
0.0
O.o
0.0
3-7
J2JL
ll. 1
f/.f
Doubtful
C.0
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0.0
t,0
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O.o
0.0
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Total
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o.o
0,o
o.o
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0,0
UAL
/to,
112 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.