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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I Evaluation O-Balloon I-Astronomical JAircratt 3-Lrjnt Phenom. 4-BirrJs 5-Cloudj. Dust, etc frlnwftic l i b . 7-PiycnoloricH (-Unkaran 9-0010 Total c .Number Certain _ ^ JL 0 0 0 0 u-LlL 1 / 2$ Doubtfui total J ^ [ ~ &1 /Y-3 rf, @ 0.0 P-0 ?*}•? #£i. £ a/(,A>/'//y6, s r l! Evaluation D-Balloon 1-Astronomical [j-Aircraft ,3-Li|tit Phenom. 4-Bnds S-Clouds, Oust, etc 6-lnsuffic Info. 7-Psycholo(ical 8-Unkno«n Mlher Total Certain / / _ / 0 '-£-. Number Doubtfu ^2 J_ / Total / -J2L-JL 0 0 0 / / 0 0 n o 0 Certain 21S 0.0 00 /7-£ 0.P 215 ~7^s\ Per Cent Doubtful! Total 0.0 ,.0 0.0 0.0 Doubtful (0.0 P.0 0.0 00 00 00 ac /0.j Total -£& /7.s P0 0.0 0.0 00 ff-P f00, ays. Number ;ertain 9 s 0 0 0 / 60 Doubtful / g 0 0 0 0 (} 7 78 Total / / l_22> P 0 23 0 7 £ 71? es PerCent Certain 7/£ 27.2 0.0 JJP. ^00 /••? Doubtful SJ- t,Y 0.0 a0 0.0 0.0 0.O 2J'./ Total Tot^ £ r e £L <_£ A/ r Number Certain 0 7s _JL -JL ff 0 CL 2, Doubtful (7 / fP P 0 •9 •I _Total 0 .1 / 0 0 0 0 0 0 0 Percent Certain ££L\ 500 JbL jki js\jii JL£L JJL £-0 /it) Doubtful 0.0 2S0 7*.P 0.0 0.0 0-# 0,0 0,0 00 0-0 ^A^p.0 Total 0.0 75:0 00 0.0 a/s P,0 00 0,0 /OP. G0c?a Nunber j Certain / ft _/L _JL -JL JL 0 /£ Doubtful 0 0 0 0 0 1 0 P P 3 Total 7 / _J2_ 0 0 0 0 7 0 7* Per Cent Certain £7* 27.1 / / . . / 0.0 AP JJL J&L 0.0 JQ-D 0.0 Doubtful 0,0 7ft,7 •0.0 0-0 0/? 0,0 p.0 ftp 0.0 fl.p Total £(, Uf /U 0,0 0,0 71.0 OP (10 mo.e /00, /}j,y,?rs=ts-i- Number :ertan l__ —£- ~yP -J- 27 Doubtful / —J— _? 0 0 0 / 0 0 • / Total Y 2, 0 0 7 2 f j 0 Per Cent Certain 2JA £J Izj- -&l JpJl JS- TZJs. Doubtful U u 0-0 P0 0.0 7-9 0.0 0.0 21? Total 5.Z /</•? f/f 3-7 0,0 00 0.0 J7A 0.0 700. 7?s?s7tf Number Certain / s/_ ^ ff ff 0 ff_ / / Ooubtful 0 0 0 0 0 O 7? 0 0 f Total / If Is 0 0 0 0 2 ^_ PerCent Certain rt.2, 9.7 0.0 0.0 0.0 lt-7 0.0 /U 77.3 Doubtful 0.0 22-7 0.0 0.0 0.0 00. 0.0 0.0 22.7 Total 40-9 0.0 0P 22-7 0,0 97 /0p. 138
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.