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.
“R.G.”3 pages
Evaluation
0-Balloon
1-Astronuiial
2-Ancrafl
3-Li(fit Ptitnora.
4-Birds
5-Clouds, Dust, etc
S-liwilfic kifo.
7-PsydolofcH
S-Unkoowi
9-OOicf
Total
Certain
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J
0
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3
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P
0
X
/
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0
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3
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0
7
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3
70
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14-0
MO
OP
to0.0
0,0
3Q.D
0.0
700
Per Cent
Doubtful
AO
0.0
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L:
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0.0
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400
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7
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76
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6-7
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Evaluation
0-Balloon
l-Astrononical
2-Aircraft
3-Lijlit Ptienom.
4-Birds
5-Clouds, Dust, e t c
6-lnsuffic Into.
7-Psycholojiul
8-UnbMWi
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77
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6
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77
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3
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0-0
0.0
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1
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p
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0.0
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0.0
20,0
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11
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IPO.
Evaluation
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1-Astronomical
?-Aircraft
3-Ligrtl Phonom.
4-Birds '
S-Clouds, Oust, e t c
6-lnsutfic Info.
7-Psycholoptai
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0
0
3
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3
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3
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400.0
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Evaluation
0- Balloon
1-Astronoaiial
2-Aircraft
3-Lifht Ptienoa.
4-Birits
5-aouds, Dint, etc
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6
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301
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0.0
0.0
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300
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70.0
30.0
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6-20 Ai/n/fres
Number
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3
0
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7
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0
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0
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0
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0
3
0
y
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0.0
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73
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0
/
0
0
0
0
0
0
4
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3
/
0
0
0
/
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00
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0.0
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6
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Doubtful
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0
7
0
P
0
0>
P
P
0>
7
Total
0
/
/
^
0
P
7
PerCent
Certain
0.0
373
0.0
0.0
o.o
0.0
2/A
/0S
70S
mi
Doubtful
0.0
0.0
0.0
0-0
0.0
0.0
0.0
0
O,0
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Total
0.0
53
0.0
0.0
AO
3A*
/AS
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236 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.