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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 l-Astionotiical 2-Aiiaaft 3-Ujht Phenon. (•Birds 5-CloudJ, Dust, etc. 6-lnajffic Info. 7-Pjycholopcal t-IMuxran 9-Otfier Total Evaluation 0-Balloon 1-Astmoaical 2-Aircraft R i g t i t Phenoa. 4-Birds 5-Clouds, Dust, etc 5-lnsuffic Info. 7-Psychological Hjntomm 9-Ottier Total Evaluation 0-Balloon 1-Astronomical 2-Aircraft 3-Light Phenoa. 4-Birds 5-Clouds, Dust, etc. 6-lnsuffic Info. 7-Psycnologiol 8-Unkjxmn 9-Ottier Total 7%4/- Number Certain g 10 2, 0 0 t 0 13 I 4S r/ftfi Certain /2, 2/ // 0 D S a 5~3 / III Doubtful / £ // / 0 0 p z. 0 J9 £ .0 00 7-0 /•7 176 7,0 19./ Percent Doubtfu &7 7O '4s 00 0C 0-0 of 0.O 0.0 20.9 Total 27.0 I/.3 ft 00 00 70 U 27.0 70 too. 77- 4T(0n> V Number Certain J1 J'f / /£• 9 67 r// 4. 2. 0~7 //%> ' */£sr jr/y L/gir Percent Certain /4g /3./ Z.S /.I 0.0 0.0 6.2, J2J2\ ?9.O 744 ?/? 2&/Z& Doubtful 2.g /2,.& 74 /. / 0(. / / 0.0 0.0 0-0 0.0 {Si fa / Total /U /&? 2. Doubtful £ s / 0 0 0 0 0 ¥ /0 Total • f S / 0 ¥ 3 2-t. Percent Certain S.g /sr¥ 3.X 0.0 0.O /s:4\ 3.g /IS .?.& Us Doubtful 77 Jg 0O 00 0.0 MA /s-4 ?g.G Total (/•s /6^3 (92 rft 00 /&4 3.2 //•£? 19 z /00. sr Nuaiber ;m*n 7 _$- / 0 2/ 4/3 s/c Doubtful 2, g- 0 0 ?• /g >//r/ ?G//> Total f // / /0 0 & ? 6/ /P6 S a/ /A/ 7 5/0/1/ we Percent Certain //•S fg '$2 /£ 0.0 0.0 f.3 0.0 l¥4 At. 70.4 Doubtful f . f /S/ f-g 0.0 0.0 0.0 0.0 •00 13 29. s /A 7"* Total /?$ f?9 /ffl &0 00 3? 0-0 ?4f ¥9 /ft?, Number ;ertain S£S. Doubtfu 7" Total Number Certain Doubtful TotaP PeiCent Certain -• Doubtful //I/ 6/0/V Total PnCent Certain Doubtful # Total sr?/?r'£6' /> 95 li/}L/)n,t£ 0? Soor* /V/atvesr Mmber Certain /7 J¥ j S0l 2*9 Doubtful /7 2/ p- 2 0! 01 / 0 2, 7g S7~,e<f7~4. Total •?</ 92 2 0 J4 4. /0g 7 337 ~<5/f PnCent Certain £0 /a/ /L.9 0.0 /0./ 0? 32.0 /.£- 76 9 Doubtful £0 i.Z /0.4C 0.0 0,* 0/0 010 (P.3 0,0 0.£. 23/ Total /00 //.. 1 27,S 03 06 0.0 /a/ /Z 31,0 Nunbei Certain Doubtfu xr/e/?; Total rS6/c Certain « - ^ Percent Doubtful Total Number Certain Doubtfu Total Certain P e r c e n t Doubtful Total 249

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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.