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
7/)Al 42/7 'y/9/. Evaluation 0-Balloon 1-Astronomical 2-Aircratt 3-Lifht Ptienort. 4-Birds S-Clouds, Dust. etc. 6-lnstiftic biro. 7-Psyete logical (VUnknoMi S-OAer Total Number Certain 2S/ &?y M£*/£J/I/ £0£Jr/0/l/ Number ;ertain 24/ 403 tzf 29 /. 2-0 £> /Z- Doubtful 0 2, / f (P 0 0 C 0 3 Total Z. S / / ,0 4,7 1-7 G0 /?, 5( Z0 9 2?L 44 99 Wo Percent Certain 9.0 //9 / / 0.S- 0./ /CO Z.6- ft* 33 7/9 Doubtfu 60 90 0$ o4 /> f 00 03 00 0? 22./ ToUl /s-0 70 t 2.2 04 (0,0 /•t /9.2, ¥ / /t>0. Certain ?/)* 2717. 79 2 ?2&. 4/f 12* '0/V '/C/fA i//V/re£. Number Doubtful 2/0 20 f 0 f p /? ' Total 34i £S(, 4$l 41 i9 £U 4/t 9/ 223*/- / /, J.0 ' Sr/tr&s Certain ?£ /*7 /2.2 A3 05 0.1 /0./ /(, 3.2 7/5 Percent Doubtful tt /0.2 94 09 0¥ 0* 00 04 00 09 Total /£$ ?4-9 2/7 -J-2- 09 04 /A/ /$•? 4/ /Si/*/)"2A^ r A? As- /i 0A/ /1/ttf/9 0i9 Number Certain J /I £ 0 P 4 / /£ i/7 Doubtful 7 / p 0 & / /3 Total 7 24 0 / 0 ¥ 3 60 Certain £T0 2t$ gJ 0-fi 0.0 /r 7 /7 7XJ Percent Doubtful (f 7 ((•7 0,0 0P 00 c 0 P (P P / Total 9 j j $ p 2, 0 /J 3 J4- certain s.9 2L.6 2.9 0.P PP £9 0-0 97/ Per Cent Doubtful 2.? 0.P 0.P 0 P 0P P P P.P PP 0-0 2.9 Total %~.$ 2i£ tf 2.9 PP PP f?.9 PP ?% zee. i I, Evaluation 0-Balloon l-Astronomical 2-Aircraft 3-Lighl Phenom. 4-Birds 5-Clouds, Dust, e t c 6-lnsutfic Info. 7-PsydnlO|ical tvunknom 9-Ottie" Total MEXICO Number Certain 7 / P / 0 0 2, 0 4 0 9 Doubtful 0 7, / p 0 0 0 0 0 0 3 To.tal / 3 / / 0 0 2 0 4 0 Certain I* t-3 0-0 $3 00 P0 /&••? 0.0 3f3 00 1Z/> •erCent Doubtful 0.0 U,-7 KJ P> (7 2. 0 5" 2- 17 Doubtful / ,f 2> 0> P / P> /? 0 P ft Total 4(3 , / (? 0 / 2 P 5 7. ?(? I Certain /0.0 S.2 0,0 0,0 00 (t-7 0.0 tt-1 t-7 er Cent Doubtful $0,0 6,1 0.0 (20 ,?? 0.0 0,0 00 00 4?1 Total #•* /0.O 0,0 00 ?3 /f-7 0,0 /t-7 /f-7 /no Number lerttin Doubtful Total Per Cent Certain Doubtful Total Number Certain Doubtful Total Per Cent Certain Doubtful Total 243
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.