Scientific Study of Unidentified Flying Objects (the Condon Report, complete, three volumes)

would cause wajor variation in compass readings, Such slight locution
error probably accounts for the lack of agreem~nt in the 5 August an~
IS August columns of Table 1, which shows data taken to test the perma-
nency of a pattern previou5ly scrambled by twisting the magnet over the
area. Points A.-l through A-12 are specific points 1 in, apart on each
of two parallel lines .2 in. apart within Area A. The agreement of the
two right columns shows both that the test points were acc:.urately relo-
cated a!',.. that the pat tern was retabcd.
While we did not determine the minimum maf~n(:tic field which WQulli
~lter the car pattern, an indication that its value would be only a few
gaus~ is given in data shown in Tables 1 uno 2, and Table 1 is
included here for that reason.
As seen in Table :5, 5 August readings were si.gnificunt ly oj ffc~'ent
frfJln the original values for all points ot:ler than Ib and 18. After the
originaj values were determined on 18 July, the magnet had been passed
directly over point 13 and within an inch of pOil't Y (111c mu~net was
passed over points 1-8 invariable orientation, showing initially that
the patterl1 was thus changed. The data for passage ov~r points 25~3l
were chosen for presentation in Table 1 because of the ob~ervable
deterrninatioll of residual orip.ntation.) These passes of the magnet,
plUS its p~ssage over Area A, apparently altercJ the mUfTIctic pattern
at all points whh:h were less than a foot from tho magnet (note a Itcred
values on 5 August f01' points 9-15 in Tablo :;, points 28-31 in Table 1).
More predse quantitative tests of the effect of magnetic fields of
varying strength on the residual magnetic pattem of automobiles would be
interesting. The above tests, however, show that a 1 kg. Hell! is more
than adequate tr ,itcr this pattern pormanently.
One case of reportod car- stoppage, OCCUlTing during the term of tile
l:olorado p··oject. wus studied ill the field (Case .W) u~ing a simple
\.'ompuss uf good q\lullt>'. The corrcsponJence of tnllgnctic signatuTl: of
the uffectc~ car witll that of A comparisop car of the same make and model
in a diffcl'(lnt geogral'hh;1l1 location was 5~riklng. The (,;orrcspondencc
showed thut the Eluto01obill,3 in qUPlstion had not been suhjeded to II nltlg-
netic field of high intensity.
160
would cause l1'ujor variation in compass readings. Su..:h slight locution
error probably accounts f0f the lack of agreement in the 5 August anJ
15 A.ugust columns of Table I, which shows lIata takt!fl to test the perma-
nency of '. The correspolHlonce of iJl<lgl1ctlc sigl1aturt: of
the affectell car with that of II comparisO)1 car of the ~amc make and model
in a diffcnlllt geographh;al location was s~rikJ.ng. The <.:orrcspondencc
showed that the automobile in qUP\5tion had not been suhjected to II nw&-
netic field of high intensity.
160