Documents / FOIA release
This CIA-released copy of Project Blue Book Special Report No. 14 is dated 5 May 1955 and comes from the Air Technical Intelligence Center at Wright-Patterson Air Force Base. It is a statistical analysis of about 4,000 unidentified aerial object reports from 1947 through 1952, coded onto IBM punched cards with the help of a panel of scientists. The report concludes that such objects were highly unlikely to be technological developments beyond present-day scientific knowledge. It also found no valid evidence of physical matter.
“Gray”4 pages
Read from the scan by GLM-OCR; expect the odd misread word.
Evaluation Excellent Good Doubtful Poor Number Per Cent Number Per Cent Number Per Cent Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 19 13 32 6.2 4.2 10.4 100 63 163 9.3 5.9 15.2 100 90 180 7.7 6.2 13.9 51 24 75 9.7 4.6 19.3 1-Astronomical 45 30 75 14.6 9.7 24.3 166 110 276 15.5 10.3 25.8 202 138 310 15.6 10.6 26.2 63 63 126 12.0 12.0 24.0 2-Aircraft 41 19 60 13.3 6.2 19.5 105 108 219 9.8 10.1 19.9 157 135 292 12.1 10.4 22.5 51 26 77 9.7 5.0 19.7 3-Light Phenom. 2 0 2 0.6 0.0 0.6 10 9 19 0.9 0.8 1.7 15 15 30 1.2 1.2 2.4 5 0 5 1.0 0.0 1.0 4-Birds 0 2 2 0.0 0.6 0.6 5 9 9 0.5 0.4 0.9 12 3 15 0.9 0.2 1.1 2 1 3 0.4 0.2 0.6 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 8 10 18 0.7 0.9 1.6 4 3 7 0.3 0.2 0.5 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 12 0 12 3.9 0.0 3.9 33 0 33 3.1 0.0 3.1 150 0 150 11.6 0.0 11.6 103 0 103 19.6 0.0 19.6 7-Psychological 0 0 0 0.0 0.0 0.0 3 1 4 0.3 0.1 0.4 21 6 27 1.6 0.5 2.1 14 3 17 2.7 0.6 3.3 8-Unknown 108 0 108 35.1 0.0 35.1 282 0 282 26.4 0.0 26.4 203 0 203 15.6 0.0 15.6 96 0 96 18.3 0.0 18.3 9-Other 17 0 17 5.5 0.0 5.5 42 11 53 3.9 1.0 4.9 42 12 54 3.2 0.9 4.1 11 12 23 2.1 2.3 4.9 EXCELLENT GOOD DOUBT FUL POOR Evaluation Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 1 0 1 5.3 0.0 5.3 1 0 1 2.8 0.0 2.8 3 0 3 6.7 0.0 6.7 2 0 2 11.8 0.0 11.8 1-Astronomical 3 0 3 15.8 0.0 15.8 7 4 11 19.4 11.1 30.5 16 4 20 35.6 8.9 44.5 6 0 6 35.3 0.0 35.3 2-Aircraft 1 1 2 5.3 5.3 10.6 1 1 2 2.8 2.8 5.6 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3-Light Phenom. 0 0 0 0.0 0.0 0.0 1 0 1 2.8 0.0 2.8 1 0 1 2.2 0.0 2.2 0 0 0 0.0 0.0 0.0 4-Birds 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 4 0 4 21.0 0.0 21.0 2 0 2 5.6 0.0 5.6 2 0 2 4.4 0.0 4.4 6 0 6 35.3 0.0 35.3 7-Psychological 0 0 0 0.0 0.0 0.0 0 1 1 0.0 2.8 2.8 2 1 3 4.4 2.2 6.6 1 0 1 5.9 0.0 5.9 8-Unknown 6 0 6 31.6 0.0 31.6 11 0 11 30.5 0.0 30.5 9 0 9 20.0 0.0 20.0 2 0 2 11.8 0.0 11.8 9-Other 3 0 3 15.8 0.0 16.8 7 0 7 19.4 0.0 19.4 7 0 7 15.5 0.0 15.5 0 0 0 0.0 0.0 0.0 TABLE A27 EVALUATION OF ALL SIGHTINGS BY SIGHTING RELIABILITY EXCELLENT GOOD DOUBTFUL POOR Evaluation Number Per Cent Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 2 2 4 8.3 8.3 16.6 9 8 17 13.2 11.9 250 6 10 16 5.8 9.7 15.5 1 0 0 0.0 0.0 0.0 1-Astronomical 7 5 12 29.2 20.8 500 13 7 20 19.1 10.3 29.4 15 26 91 14.6 25.3 39.9 1 1 2 10.0 10.0 20.0 2-Aircraft 2 0 2 8.3 0.0 8.3 3 0 3 4.9 0.0 4.4 9 5 14 8.7 4.9 13.6 2 0 2 20.0 0.0 20.0 3-Light Phenom. 0 0 0 0.0 0.0 0.0 2 1 3 2.9 1.5 4.4 0 5 5 0.0 4.9 4.9 0 0 0 0.0 0.0 0.0 4-Birds 0 1 1 0.0 4.2 4.2 1 2 3 1.5 2.9 4.4 1 0 1 1.0 0.0 1.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 0 0 0 0.0 0.0 0.0 2 0 2 2.9 0.0 2.9 14 0 14 13.6 0.0 13.6 3 0 3 30.0 0.0 30.0 7-Psychological 0 0 0 0.0 0.0 0.0 1 0 1 1.5 0.0 1.5 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 .00 8-Unknown 5 0 5 20.8 0.0 20.8 14 0 14 20.6 0.0 20.6 6 0 6 5.8 0.0 5.8 2 0 2 20.0 0.0 20.0 9-Other 0 0 0 0.0 0.0 0.0 3 2 5 4.4 2.9 7.3 0 6 6 0.0 5.8 5.8 1 0 1 10.0 0.0 10.0 EXCELLENT GOOD DOUBTFUL POOR Evaluation Number Per Cent Number Per Cent Number Per Cent Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total Certain Doubtful Total 0-Balloon 0 0 0 0.0 0.0 0.0 5 2 7 6.8 2.7 9.5 10 3 13 4.9 1.5 6.4 1 0 1 1.2 0.0 1.2 1-Astronomical 8 8 16 22.8 22.8 45.6 3 36 59 4.1 48.7 62.8 47 59 106 23.3 29.2 52.5 16 29 45 19.0 34.5 53.5 2-Aircraft 4 0 4 11.4 0.0 11.4 6 8 14 8.1 10.8 18.9 17 17 34 8.4 8.4 16.8 4 1 5 4.8 1.2 6.0 3-Light Phenom. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 4-Birds 0 1 1 0.0 2.9 2.9 0 0 0 0.0 0.0 0.0 4 0 4 20 0.0 2.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 6-Inseffic. Info. 0 0 0 0.0 0.0 0.0 6 0 6 8.1 0.0 8.1 21 0 21 10.9 0.0 10.4 9 0 9 10.7 0.0 10.7 7-Psychological 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 3 0 3 3.6 0.0 3.6 8-Unknown 9 0 9 25.7 0.0 25.7 8 0 8 10.8 0.0 10.8 21 0 21 10.4 0.0 10.4 18 0 18 21.4 0.0 21.4 9-Other 5 0 5 14.3 0.0 14.3 0 0 0 0.0 0.0 0.0 3 0 3 1.5 0.0 1.5 3 0 3 3.6 0.0 3.6 </td
FOIA release, from the cia-readingroom collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 312 pages are in the text index: search them above, or from the library's search.