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Project Blue Book Special Report (second copy)

Internet Archive · 309 pages · text from the file's own layer

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 1-Astnnoiiiical 2-Aircraft R i g h t Pfienom. 4-Birds S-Clouds, Dust, e t c 6-lrmffic Into. 7-PsyctDlo|ical 8-Unknown Wither Total rfisi £ /*?23 /lAffi*/ ; Number Certain A6 20 ffj 2. 0 0 Doubtful A£ A C? 0 0 0 0 tr Total 2ff iff 3 0 0 2/ 7 26 f7f Certain 9.0 ft-g 00 00 //•f A4./r Per Cent Doubtful 6.7 0-P 0.0 00 00 00 00 AZT-7 0F Total A4/ / / 0.0 0.0 //[ Jf 2S AM ./JA?rA6 Number lertain -ML. / / /ff~ 2 Doubtful A0 A0 0 • J 26 Total {£• Z0 24 / 0 / ft Certaii Aflf /i,7 At VJ 0.0 /•I ?4 3er Cent Doubtful ZA /A 9 //•? 0.0 0.0 0.0> 0 0 Total A7.g 2Z6 A-2, 4 if 0.0 ?•« /,& At? AC Number :ertain -4- £L. 0 -JL // JL j Doubtful /A 27 2. 0 g_ 0' 0 0 60 Total s/ •7 / / 0 3 2.A0 Per Cent Certain ?0 A£0 A/.0 0.ff 0.0 0.0) / a 7A4 Doubtful o7 6- Z /2-9 /.0 0.0 Zf 00 0.0 0.0 Sli. Total /^_7 29(2. 2S? /•0 0.ff £2 00 2ffi. A. 4 /00. Certain c 10 ff ? fr* lAk££ Number Doubtful 0 / 3 44" Total 2~i / r ' ,f //0 t Certain f , - ^ . ; 9 .' •\9 r r q • :6-4 •i:0r d*. erCent Ooublful . '\9 ' • , ~ - ' / 0.0 2-7 00 .' $ Total /S2, A?. 0 *>•? 0.0 C' ? ? ' /£•$• 7/9iSA.£ A?224 £lA/?{_///9f/0AlA 0A /?/./- SA6>/A7AAy&5 / / f 77A£ "5T/C/9A~£A", • :* /9/C£'/9i 0A? r/V£ eSAlATi?/?/. Evaluation 0-Balloon l-Astronomical 2-Aircnft 3-LijtitPhmom. 4-Birds 5-Clouds, Dust, e t c Wnsuffic Into. 7-Psycholotical 8-Unknown M t h e r Total A?/S//>/}£D Number Certain 20 // / 0 A2, 66 Doubtfu ? A Q & 0 0 0 0 2Z Total 2$ /9 / / 0 // A* Percent Certain 2-3 / • / 0.0 /Z-S &7 Aft Doubtfu £•/ 9-/ ?•/ / • / 00 00 0.0 00 0.0 40 2f.0 Total f.O / / / • / 0.0 /*•£ S-7 /U /£0. 0/!'A7~0V Number Certain 2/ J7 2A A $ 20 2, JL AfZ Doubtful 9 A'S__, 23 ¥ 0 0 0 0 ei, Total S0 ss ¥4 / 0 A 0 20 2. AS? f ff* PerCent Certain A/.Z M. JI- 0-f 0.1? AM -IL Doubtful U 2 A 0,0 00 0.0 00 00 / • / ftf Total %. 0 2f.3 ff 2 0,* 00 A06 / . / U 4? A0O. /tyA0faA/fS7~ J?£~(£A0/I/ tf/}£/?/ltf£ /PF A£y7/?AL A"7/01v£S7 Number Certain Ai. AJ g- A 0 3A 44 g- AS 9 Doubtfu _£l_ A0 All f 2 0 0 0 0 4& Total f7 4? ZJ X 3 0 3A ff 44 20$ P e r c e n t Certain 7.S Af-0 6.3 2-4 0.4 0.0 AS/ 2/.$ 2.4 Doubtful A0-?. 4 9 A-0 0.0 0 . 0 00 00 22-4 Total 0.0 23 9 A/-*- A* 0(P 2-4 2/.S 2f /OO. Number Certain Doubtful Total Per Cmt Certain Doubtful Total Evaluation 0-Balloon l-Astronomical 2-Aircraft 3-Lijht Phenom. 4-Birds S-Clouds, Dust, e t c 6-lnsuffic Info. 7-Psycrnlogical 8-Unknown Wither Total £ , Number Certain AB AA /? 0 0 0 A6 A / *& Doubtfu ff 3 /A 0 0 0 0 & Z, Total A4 ?fi r? 0 0 Air 3 22 3 AA2 £fr 0F Certain JL&. /*Z £0 _&0_ /4s 0.9 JU- 0-9 Percent Doubtfu 7, A 27 9.f 0.0 0.0 00 00 / • % 0.0 /? 23.1 Total 23./ /2.S 2S.0 0.0 0.0 aa /S f/}£ t^/£ST #F6/0y Number Certain 9 0 / 0 SI Doubtful 6 3 Al 0 A 0 0 0 ft 2.2- Total / S 2/ A A * 0 A .<s4 Percent Certain x£t 93 ALZ- AO. 0.0 AiS 0.0 /I.I /.t S1L Doubtful / / • / 22.1 0.0 0 0 /• 9 0.0 0 0 0 0 0 O 40-7 Total A4$ A<A 9 32? /•? 0.0 /•? A4 % o o / / • / /•? /O0. Number Certain Doubtful Total Percent Certain Doubtful Total Number Certain Doubtful Total Per Cmt Certain Doubtful T o t a l i 248

Cases discussed

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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.