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.
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Evaluation 0- Balloon 1-Astronomical 2-Aircraft 3-LijM Pnenom. 4-Birds 5-Clouos, Dust, etc 6-lnsoflic tito. 7-PsyctBk)|iol 8-Unknoin S-Olfwt Total r/l0L /111 Nuobef Certain ¥& 0 0 f 0 Doubtful 0 f(> 0-0 I£J2. //70-1 Doubtful 00 -&J2. 0-0 C?.0 -J2J2. 00 0.0 0,0 t?.0 0 0 0.0 Total 00 /00C 0.0 /0.0 0.0 00 0-0 ao 0 0 a/? /0 f t ~£0 /9^/ Number :ertan _ ^ 7 _ _ ^ 0 _J2_ Doubtful 0 0 C 0 0 0 Total 0 /S 0 0 0 0 P y 0 /t Certain _Pg_ £/Z PP P.t? 0,0 0-e 00 /?•* $• £? 'er Cent Doubtful 0.0 0.0 PP J2£- 0.O 0.0 0.0 00 SZ>.£> Total 0-0 po 0.0 0.O Pf PP PC /}.£> f f / PerCent Certain 0.0 2G0 -&£-. 00 0-0 #0 0.0 0.0 0.0 2£0 Doubtful /0.0 62. £ ' 0.0 P0 V2.$ 00 00 00 0.0 fa0 Total 0.0 %7£ 00 0.0 /2.£ P0 0.0 P0 P0 /#a Evaluation 0-Mloo. l-Astmoaical ?-Aircntt 3-LiJtil Plimo*. 4-Binh 5-Clouds, Dust, etc 6-lnsuffic Info. 7-Psyctnl0|ical S-UnknoM Klthet Total . /?1T0 Nunbti Certain / ., / . 0 0. -£- 0 0 0 ..JP. 0 & DMlbttu ff (? (? 0 f? 0 0 e & Nuaber Certain rDoubthi Total PerCent Certain Doubtful Total • Evalualwn 0-Balloon 1-Astranoaical 2-Aircraft 3-Lijtit Phenoa. 4-Birds 5-Clouds, Dust, etc 6-hsuffic t i n . 7-Psycholo|ical D-Unknom Mttier Total F A/Zf 9 (•!//} s> /lu. 2.s~ O0 0.P 0O 0.£ 26,. i. Total 2/.C /Zi 0.L At 2.S ?•* 2-S 20.3 3 / /oo. 710/1/ ¥&& Certain O _ ^ ^ 0 T r • Total 0 / 0 0 0 0 0 /2s /) ' / LL S/& J PerCent Certain 00 0,0 00 gj2_ 0,0 0.0 4/7 Doubtful 0.0 %3 P0 0,0 UL0- P.0 00 00 0.0 0.0 Total 00 00 00 0.0 00 Zf.2 0.0 Y/-7 //>-7 /P0. Certain _ ^ 0 P _J2_ 0 £_ /P i.6 Number Doubtful / 0 g_ 0 0 0 l_ 'A/r/t Total s y 0 P 0 0 0 2, / / / " ^ C0/U/ PerCent Certain /£2 3i-4 0.0 00 9./ 0.0 00 J2J2. 9/ Doubtful 9f 00 00 00 pa 0.0 00 0.P ?•/ Total ? / / fclf O.O 00 9-t po 0.0 00 tf.2. ?•'/ /at. 00 0.0 Total SS3 /s.s n? £>.O 0.0 0.0 10. 0 0.0 /0O. Evalualnn 0-Balloon 1-Astrenomical 2-Aitaaft >Lljtlt PtKKW. (•Birds S-Clouds, Dust, etc frmatlic Mb. 7-Psydnloral HWmowi Mthe> " Total /0 2f0 Total 7C /i.7 2f.a 0-0 0,0 0O ?? 00 26.0 00 m Nunibcf Certain 2, 0 _^tz 6> 0 0 _&- 0 / 0 Doubtful 0 a 0_ 0 .0 f PerCent Certain 21L 0.0 J2JL 0.0 P.0 2Z.c> 00 0.0 fl'0 ~£J2- Total 2ti(. 00 ao t?o *M 0.0 0.O / 0.0 /.0 27-7 Total /79 2tf /•o /.o 7f ?.0 £0.( 2-0 /00, Number Certain Doubtful Total Percent Certain Doubtful Total 190
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.