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.
“Otis”1 page
Evaluinon 0-Balloon 1-A.strenomial 12-Airaatt 3-Li|M Ptimom. 4-Bnite S-Clouds. Dust, t i c (.traffic, Wo. 7-Piyd»ki|ial l l M M M t MOW Total JZl VL/ A £> r Number Cettan / C 0 c 0 c t- / / Doubtful t 0 0 0 c 0 c> 4 ToUl / / 0 0 0 0 Q A 7 7- IS Per Coil Ctrt»n * . 7 26.1 O.Q 0.1 o.o 0.0 oo ' 3 . 3 fi-i OouMful ToUl 0.0 1C1 0.0 00 o.o no o £> C 0 o / 11 Total / 5 1 (. 2t 3 0 \ c 0 It 8 ft Per Cent Certain I2A 13. C I t O.Q 7 3 LSI 0.0 /S.I JA 78. H Doubtful f-s 2 3 Hi oo 0 0 0 0 CO 0.0 0. 0 1-1 11.0 Total / 7.0 181 27.2 i t 0.0 23 OS O.O /S.f 1-1 IM. Number Certain 2l -JJL XI 1 0 _JL rt « • M> s as Doubtful /f 17 IX t? 0 0 P 1 36 Total 21 H 1 3«J / 0 0 if 26 6 /(I Percent Certain n.o 111 o.c O.Q Ml 2.? a.) 3-/ 77t Doubtful 3.7 /Q.C 1-5 O.f Q.d Q.0 O-O 0-0 0,0 Q.i ?2V Total 25.5 73.6 .!, 0-P O.f II-7 3-5 U.I 3.1 lit. Nunber :ertain 60 a _JL 1 J&. __2L /& JL Doubtful U-7 3/? 7? Jf- 1 1 (? 0 1 ToUl 121 110 no u •H X 08 I* PI n PerCent Certain n-i n.i LJLR 0.5 0.2 10-t IM I8.B 1TL 75.1 Doubtful 1-7 H.C II-1 Q.(, Q.-7 0-1 • 9 - 1 0.8 0-9 0.1 Vt.7 Total 11 H /?.3 M-I IM 01 Q-H I9.lt ne if no. /}v 6UST NUBbH Certain -Ik u/ £ p 3Z- _ X / / Doutitfu .?? ZS 34 t, 1 P 1 1/0 Total 75" ic 75 / ' 0 1 11 (,1 Percent Certain It 3 ll.l II.1 l-t JLL UL 1.1 2-3 H.l %t ~m Doubtful 11.7 7-2 1.1 l l O.O 0-3 0.0 O.-i Q.O I I 3l. 5 Total 2/r 18-1 Z / f 3 1 0.0 o-i 1-7L 2 0 If-2 3-1 190. Evaluation 0-Balloon 1-A jtjonoMcal 2-Airoaft 3-Li*l PIMM. «-Binb WUwos, Dot. etc C-kanffic Mo. T-Pjjdolofcal I-IMOOM Mtnei Total Sft? T£~S-t Ff/? Ikaber Certain ^ 3-J~ _ 1 / / •/? 17- I 33 6 Doubtfu / / 3/ X jZ. / 0 2 ToUl 15 3/ 3 3 / 33 a tH7 Percent Certain 2-1 iS.O Lt Sjj OJL 0.0 £? 1 (f - 8-l 11 ?•/ Q.Q 0.0 6.2 oo 2 If 4.2 Doubtful H.I IHC 72-1 Q.O O.Q 0-0 0 0 0.0 o.O 0 0 41-1 Total HI n,75.0 7 / 0-0 0-0 6-2 Q.O 17f U-2 0. f 122
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.