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.
Evaluation 0-Balloon I-Astnowtal ?-Aiicraff 3-Li|M Prienoo. 4 - B i * S-Clowh, Dust, etc frhmffit Wb. 7-Psydnlofical t-Uakaow ToUl Evaluation 0-Balloon I-Astmnaical 7-Aircnfl 3 - L i i M P k a m . 4-Binb S-Clouos. Oust, etc S-limffic Wo. 7-Psvcholofical (-UnknoM W B l H 1 Total Evaluation 0-Balloon 1-Astnnomical 2-Aircraft 3-Ligtil Phenoa. «-Birds S-Clouds, Dust, etc 6-lnsuffic mfo. 7-Psvcholo|ical t-Unknoan 9-Olher Total Foe J/}/UV/)/et/ Number Certain / / 1 g. 0 2, s- ? Doubtful 0 ^ 0 f Tobl / O O o o o o z. / o.o 260 Total C-3 /2.$ 12.$ 3 ' 3 / O.O £?.3 S. / 4S-7 3./ lOO- /40A ;ertain / , 0 0 a a 0 0 0 1- Number Doubtful 0 0 0 0 0 0 0 0 0 0 O Total / / O O O O O O O O •2. J/SA Number Certain ? 0 O .J2- 0 0 7 Doubtful 2, /? f? 0 0 0 (? 0 2 Total f s 0 a 0 0 0 7 2 ao 0.0 o-o 0.0 0.0 ao 0.0 0.0 /ao. Percent Certain if-2. is O.O CO CO 0.0 0.0 tLL Doubtful 0.0 a.o a.o 0.0 \_ag_ O.O O.o O.O o.O ILL. Total ?7JS 20.f O.O O.O O.O O.O O.O if.2 42 /oa. /?c-r04£,e Number Certain 7 0 0 2 0 0 4/ 0 /¥• Doubtful 0 0 0 ^ 0 0 0 / Total /O / / O 2 . O O O t/L /f Percent Certain 0.0 O.O /O.S ao 00 0.0 2/./ o\o Doubtful /s.S 0.0 5-3 0.0 OS 0.0 0.0 0.0 ao £3 2C. 3 Total S-3 $.3 AO /0.S a.o 00 0.0 2// f-1 /oo. &y£ e 77*/* A//9/et// Number :ert»n / / 0 0 0 0 0 /£> O /8 Doubtful 0 '0 S3 0 O 0 0 Total 7 r 0 0 0 a 0 O /O 0 /S PerCent Certain 3R? St> O.O O.O O.O ao AO ao 0.0 /ao.o Doubtful a. a 0.0 0.0 0.0 0.0 0.0 0.0 0.0 o.a 0.0 0.0 Total S-4> O.o ff.O a.o o.a 0.0 O.B ST.*. 0.0 /eo. Joci/ Number lertain /4 /£• / 0 / / £/ 4 12. Doubtful f / 0 0 0 2 - / Total 2/ 17 /f O O z. ?2 PerCent Certain /4.3 /2.2 £I / /•O a.o 0.0 XI /.O 4LL 7U Doubtful 7- f r.te.o o.o 0.0 0.0 /•O o.a O.O 2/.if Total 2/y It 3 /if. 3 ft? D.a O.o $2 f.0 3/.L t/j /CO. As0v£/ PerCent Certain llf /2.5 0.0 o.O 0.0 O.O 2S.0 O.O 2/.S O.O Doubtful 0.0 0.0 /2-S 6.0 0.0 0.0 0.0 0.0 0.O 00 /2.4 Total 117 /2S /2.S 0.0 0.0 0.0 2SO 0.0 3/.g a.o /OO. /?#/,&sr Number Certain J 0 0 0 2 /£ /? Doubtfu J» 7 S / ^ 0 0 fR Total f /.r 0 (7 Z £ AT if Certain / / / /4% 0.0 0.0 0.0 11 0.0 tt.r PerCent Dubtful &£ /2. 1 (9 O-O 0.0 o.o 0.0 O.CD ?4 SS3 Total /(..7 ?7 7 l-f 0.0 0.0 3.7 1.7 /oo. /?£ m PerCent Doubtful DO / / • / O.O 0.O O.O o-o 0.0 00 O-O O.a / / • / Total O.O 22.2 O. a O.o o-o a.o ao 22.2. </</.</ //./ /w J 171 L,
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.