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.
# Approved For Release 2005/07/20 : CIA-RDP81R00560R000100060001-5 Evaluation JANUARY FEBRUARY MARCH APRIL 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 3 2 5 4.3 2.9 7.2 6 0 6 10.9 0.0 10.9 8 2 10 9.6 2.4 12.0 7 2 9 5.5 1.6 7.1 1-Astronomical 15 16 31 21.4 22.9 44.3 11 12 23 20.0 21.8 41.8 12 10 22 14.5 12.0 26.5 19 3 22 15.0 2.4 17.4 2-Aircraft 6 3 9. 8.6 4.3 12.9 5 5 10 9.1 9.1 18.2 8 7 15 9.6 8.4 18.0 20 7 27 15.7 5.5 21.2 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 1 0 1 0.8 0.0 0.8 4-Birds 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 3 1 4 2.4 0.8 3.2 5-Clouds, Dust, etc. 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 0 1 1 0.0 1.2 1.2 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 8 0 8 11.4 0.0 11.4 3 0 3 5.5 0.0 5.5 10 0 10 12.0 0.0 12.0 21 0 21 16.5 0.0 16.5 7-Psychological 2 0 2 2.9 0.0 2.9 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 2 0 2 1.6 0.0 1.6 8-Unknown 9 0 9 12.9 0.0 12.9 6 0 6 10.9 0.0 10.9 13 0 13 15.7 0.0 15.7 39 0 39 30.7 0.0 30.7 9-Other 5 1 6 7.1 1.4 8.5 7 0 7 12.7 0.0 12.7 1 8 9 1.2 9.6 10.8 2 0 2 1.6 0.0 1.6 MAY JUNE JULY AUGUST 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 17 3 20 13.2 2.3 15.5 28 5 33 15.3 2.7 18.0 74 41 115 11.6 6.4 18.0 39 39 78 9.6 9.6 19.2 1-Astronomical 22 6 28 17.1 4.7 21.8 22 17 39 12.0 9.3 21.3 58 38 96 9.1 6.0 15.1 43 45 88 10.6 11.1 21.9 2-Aircraft 17 13 30 13.2 10.1 23.3 28 12 40 15.3 6.6 21.9 94 72 166 14.7 11.3 26.0 47 35 82 11.5 8.6 20.1 3-Light Phenom. 3 2 5 2.3 1.6 3.9 1 1 2 0.5 0.5 1.0 13 4 17 2.0 0.6 2.6 6 6 12 1.5 1.5 3.0 4-Birds 0 2 2 0.0 1.6 1.6 0 0 0 0.0 0.0 0.0 3 3 6 0.5 0.5 1.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 2 0 2 1.6 0.0 1.6 0 0 0 0.0 0.0 0.0 1 1 2 0.2 0.2 0.4 0 1 1 0.0 0.2 0.2 6-Insuffic. Info. 16 0 16 12.4 0.0 12.4 22 0 22 12.8 0.0 12.0 74 0 74 11.6 0.0 11.6 40 0 40 9.8 0.0 9.8 7-Psychological 0 0 0 0.0 0.0 0.0 6 0 6 3.3 0.0 3.3 8 8 16 1.3 1.3 2.6 10 1 11 2.5 0.2 2.7 8-Unknown 18 0 18 14.0 0.0 14.0 33 0 33 18.0 0.0 18.0 121 0 121 19.0 0.0 19.0 79 0 79 19.4 0.0 19.4 9-Other 6 2 8 4.7 1.6 6.3 7 1 8 3.8 0.5 4.3 24 1 25 3.8 0.2 4.0 11 5 16 2.7 1.2 3.9 Evaluation SEPTEMBER OCTOBER NOVEMBER DECEMBER 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 6 12 18 3.6 7.2 10.8 8 12 20 6.4 9.6 16.0 5 9 14 4.7 8.5 13.9 6 5 11 5.7 4.8 10.5 1-Astronomical 18 9 27 10.8 5.4 16.2 15 18 33 12.0 14.4 26.4 21 15 36 19.8 14.2 34.0 18 16 34 17.1 15.2 32.3 2-Aircraft 13 27 40 7.8 16.3 24.1 9 11 20 7.2 8.8 16.0 11 6 17 10.4 5.7 16.1 7 11 18 6.7 10.5 17.2 3-Light Phenom. 1 2 3 0.6 1.2 1.8 1 2 3 0.8 1.6 2.4 3 1 4 2.8 0.9 3.7 1 0 1 1.0 0.0 1.0 4-Birds 1 2 3 0.6 1.2 1.8 2 2 4 1.6 1.6 3.2 0 0 0 0.0 0.0 0.0 0 0 0 0.0 0.0 0.0 5-Clouds, Dust, etc. 0 1 1 0.0 0.6 0.6 0 1 1 0.0 0.8 0.8 0 2 2 0.0 1.9 1.9 0 0 0 0.0 0.0 0.0 6-Insuffic. Info. 19 0 19 11.4 0.0 11.4 10 0 10 8.0 0.0 8.0 7 0 7 6.6 0.0 6.6 9 0 9 8.6 0.0 8.6 7-Psychological 3 0 3 1.8 0.0 1.8 1 0 1 0.8 0.0 0.8 1 0 1 0.9 0.0 0.9 2 0 2 1.9 0.0 1.9 8-Unknown 42 0 42 25.3 0.0 25.3 30 0 30 24.0 0.0 24.0 21 0 21 19.8 0.0 19.8 22 0 22 21.0 0.0 21.0 9-Other 8 2 10 4.8 1.2 6.0 2 1 3 1.6 0.8 2.4 4 0 4 3.8 0.0 3.8 8 0 8 7.6 0.0 7.6 </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.