DOW-UAP-D017, UAP Reported at Sandia Base, 1948-1950

HEt\DQUARTEP..S • DETACHMENT D 1100TH USAF SPECUL REPORTING GROUP Campbell Mr Force Base Camp Campbell. Kentucky ~?>'2.>,, SUBJECT: Security :E:nspection TOt Commanding General Sandia Base Albuquerque, New Mexico 7 April 1949 \ ~o ) lo' 1. Reference is made to secret letter. your headquarters. dated 1 April 1949• Subjects Security Inspection. Q,0~ ~4 2. a. Guard Orders have been amended directing that the elec­ tric gate be closed between 1700 hours until 0700 hours the following day. b. Looks have repl~ced the bolts in all inspection access gates in the outer fence. c. Inspection ports on both bridges are now pr ovided with locks . d. The final draft of our alert plan has been reviewed and will be published and distributed for study to operating personnel. It is desired to point out that the alert plan is incomplete . stockpile custodian has not been assigned here; his part in the alert plan has been outlined only. Furthermore, since the 11th Airborne Division is not in place yet, only temporary arrangements for defense have been made. Final form of the overall alert plan will be sub­ mitted to your headquarters for approval as soon as conditions will allow. ·1n the interim period. it is felt that the temporary alert plan we have prepared is adequate . Final form of the overall alert plan will be sub­ mitted to your headquarters for approval as soon as conditions will allow. ·1n the interim period. it is felt that the temporary alert plan we have prepared is adequate. A copy of this pl an will be dis­ patched to your headquarters in the near future. !. ' e. !11 jeep radios are now installed in jeeps. r. ~lthough not entirely satisfactory. radio oom.munioation with the Camp Campbell Military Police has been in effect for some- time and was in effect at the time of the Security inspection. .Pe~­ manent arrangements for radio communication with Camp Campbell Military Police are de l ayed panding the arrival of radio frequency crystals that fit the Milit ary Police net frequency. Short Ti tle -~-:L~-=-~--=----~/_f­ SHORT TI~ f fhB I , ~ I V ,. ,., .., ..; • . - SUBJECTs Security Inspection # , series__ ' ., ww o . ..2.::pages, copy / ~ 7 April 194.9 g. Pressure has been exerted to get the Pos t 'Ehgineers to keep the dra.inage system. clear and to take measures to check the ero­ sion. These efforts will be continued but li t tle progress on erosion control can b e expected until the rains diminish. Ditches have been filled, dirt moved and replaced, native gras s es planted, but the the ero­ sion. These efforts will be continued but li t tle progress on erosion control can b e expected until the rains diminish. Ditches have been filled, dirt moved and replaced, native gras s es planted, but the rains return too soon and much of the effort invested is therefore wasted. Plans a.re prepared f or an interim erosin control effort, and a stud;y is being ma.de to estinate the cost of resloping the cuts in order that the rainfall mq be drained with less damaging results. Initial estimates run in the neighborhood of twenty thousand dollars (t20,ooo.oo). 3. With the exception of halting the erosixm, all deficiencies listed in the security inspection report have been cleared away. It is therefore requested that the monthly report of action taken re­ quired by cited letter be discontinued. /(~4/./?L_ RICHARD TI' KLIN.!!i Lt Col, USAF Commanding • SEGRET HEADQUARTERS SANDIA BASE Albuquerque, New Mexico AFSWP CLASSIFIED DOCUMENTS LIBRARY Fl LE NO. 45~. S- SUBJECT: ll'T.- ;,J)..o;y ~·o ¥ e:i: 10 August 1949 Dr. L1nooln ~ InDtituta of 'Meteoritics University of New Mexico Albuqu.erquo , N. :t:. Doar l.1ncoln: I a::n lnclos1ng two copies or the report you asked tor, fllld hope that they oerve their purpose uta of 'Meteoritics University of New Mexico Albuqu.erquo , N. :t:. Doar l.1ncoln: I a::n lnclos1ng two copies or the report you asked tor, fllld hope that they oerve their purpose. \'lo Jiave mado a preliminary ez:eminntion ot tm elghtaon collact1ona token at nine locatione on my, l!onde.:,• 'l'uesday trip . !lbere was a large number of coppor- boar1ng pe.rtiolee on one eolleoti on (ll-104L) taken on Higm1ay 84, seventeen ·mles north ot E1gl:may 66 1 and aoa.ttered occas• i onal particles throJJ.ghout the series . The collection teken at tho Blt"lle location imcodi ately' following R- l04L eho'\YD practically no copper. A 1orge l)art of the n - 104L is of a granular mnterial untamiliar to us , and , the copper indioat1ona ori,:.inate principal ly 1n l'lhat are e.pparontl'1 aggregations of finely (ona .. meron) granular material of overall sizes in tho neighborhood of thirty microns. Some cop_per _part! ,lea, hor.- ever, appear to be solid nnd o,Paque. The passage of t-, automobiles while this oollection uas being made is a complicating fe.ctor . to aee how they mieht he.Ta been a eourco ot coppor , ho,raver , unlean it nao a question of stirring up ao passage of t-, automobiles while this oollection uas being made is a complicating fe.ctor . to aee how they mieht he.Ta been a eourco ot coppor , ho,raver , unlean it nao a question of stirring up aoI!lo :trom dust on the -pavement. It is hard We intend to do some :1"urther chemi.eal work Tii th theee colloctions , but I doubt if muoh nen relevant information 11111 be obtained. Hy tentative conclusion is that no ~idcspread significant dispersion or copper- bea't'ine; particles ,vas present in tbe atmoaphere in the rc"ion covere.:1 at the timo the eollcct1ons wore made. is possible about the one heavy copper collention: i t should be prosumod to be of local origin until come evidonee to the contrary ic 'found. l,o det1nita statel':lcnt ~e route at tho collocting trip included Paatura, Santa noaa. , junc­ tion of Routes 66 and 84, ond Las ·Ve.:;aa on J!ondey af'ternoon. On Tuosdey morning i t included. Las Ve3as , Canonr,1 to , Glorieto. end ecos . Yours vory truly, mx,~ o.ttaobments (2) M - R/D- tw 8-10 -49 ' AN AT'l!EMP? 'ro coU.roT AnBCP.NE PAU'ICLES A'3SOOIA'l'ED fJI'l'iJ THE FIREBALL OF JUL ~ o.ttaobments (2) M - R/D- tw 8-10 -49 ' AN AT'l!EMP? 'ro coU.roT AnBCP.NE PAU'ICLES A'3SOOIA'l'ED fJI'l'iJ THE FIREBALL OF JULY 24 1 1949 By • n . Oroztor and Ben x. Seely HBTHOD A 'fireball was raportad to have pasaod ovor the general noighborhood of Impaotment equipment , develop9d Socorro, Uew Uexi.00 1 at 8:26 p.m. 1 J'uly 24 1 1949. in conneation 1a th the sarosol research proJect ot the New Mex1 co School of !lines, was available, and it was decided to make systematic collections ot airborne me.ter­ - iel. in the hope ot obta1nill8 material that could be associated .-1th the t1reball. For the present report it is suftio1ent to state that the equipnant processed air at the rate ot about J4 11tera per minute , the particles being separated f'rom the air by -impactment against en adhesi'f9-coate~ plate in an air jet. Appro:d!natel.y ninety per cent of airborne particlee with dianeters greater than one micron are collected. Tho adheeive used. on the collecting plates (mcroscope slides) waa a glycerin­ gelatin tlixture w1th an a.dd1tion or rubeanic aeid (dith dianeters greater than one micron are collected. Tho adheeive used. on the collecting plates (mcroscope slides) waa a glycerin­ gelatin tlixture w1th an a.dd1tion or rubeanic aeid (dithiooxamide . ) 'l'lus reagent was used to enable identifioation of copper or copper compounds; it also enables identification of nickel and cobalt. After ?C:lking the eollaotions , the slides were covered with e. Saran til::l, after which thoy were exposed to strong aomonia vapor for r1:tteon Jninutes to effect partial ao lution or any copp_er or copper oxide parti­ el.Gs. R ESULT S '?he first oolleotion was made at 10: 00 a . m., .ruly 25, about thirteen and one- he.lf houra after the fireball was seen. The air wan te.lcen about twelve teet above ground lovel, on t he Ol!!'.IJ>UO ar the School ot Uines. Tho first run was i'or three min- utes , ll['COosaing cbout 102 liters of air . Sevoro.l large particles wero :round in it that gave J)ositiva co pe.r teats. In at least ono or these the copper reaction was aeen petore t he cn::mx>ni c tro~ont , indicating the presence 9f at least a trace of a aoluble copper co~pound. The sizes of particles aoon in tho first these the copper reaction was aeen petore t he cn::mx>ni c tro~ont , indicating the presence 9f at least a trace of a aoluble copper co~pound. The sizes of particles aoon in tho first oollections ranged up to over one hundred microns in the largest dimension: tho impression o~ bein.g f'r8gl:lents or a so:i:ievm.at f'ibrous material, llith the smaller the largest particles gave , ~~ Page 2 dbension oi" ,the o-rder o~ twnty or thirty .:nicrono. There were no Br:lall partielee, that 1e, no particles 11'1th n iruuiml1!11 di?DeXUiion below 15 microns . , J'ollmring tho :f'lrat colleotion, ,additional oolleotions 1f8re nade , tindor aimi• 1ar conditions. over a period of elght daya . The aooco.pann,ng table su:n:iarisea the colld1t1ons and copper counts ror all tbese collections , including tho first ono described above. wero tor periods lor.,;or tfum three minutes , but °'he oouhts have , 1n 'tbeee cases , been reduced to the threo-:nnuta equivalent. Olio eolleetion showing oevora.l large copper indications , tekon J"u~ 25, ia omm:1ttnd fron the to.blo because it was damaged in courae ot a teai for radioaotivity by nnuta equivalent. Olio eolleetion showing oevora.l large copper indications , tekon J"u~ 25, ia omm:1ttnd fron the to.blo because it was damaged in courae ot a teai for radioaotivity by exx,osure of a nmlear track plate (vrith negative reoultn) end a det"inita count oOllld not be made . nU!!lbor of the ru.ru, The counts are exhibited in tbreo size claeRiflcations, end attention is directed to tlie :ta.at that particles in the smallest s!ze croup (l to l5 microns) e::-e practically absent trom the early oollectlona, mil& in the later collectiow,, particles 1n the largest (.30 mioron.o) 8Ii.d middle (15 to 30 microna} groups have become cp;ite esoarce. At the same tine, the counto have beccte quite large in tile :.s:ncllest aizo group. SIONIFICA~CE OF RESULTS If 1 t were possible to SflY that particles giving a copper test are generally very rare in eollectione near groimd leTel in this locaJ.lty, the above facts t'.Ould bo highly s!gni1'1cant. It l1appens , however , that collections have been :-:,ode at Socorro over only- a short period, and not .muoh e.tten1i1on has been given to !denti­ fica.tion ot copper coJ:lJ)ounds. It l1appens , however , that collections have been :-:,ode at Socorro over only- a short period, and not .muoh e.tten1i1on has been given to !denti­ fica.tion ot copper coJ:lJ)ounds. ::aowever, after the copper indieetions had been round in the present sories of: collectio•,s, some collections were round on file that hod been made on plain glycertn- 3aui.tin on july .1,, 1949 . -These r.are oovered ,nth the Sarun fi-lm and rubeanic eoid C!Jld an::.on1a were appliod by d1 tfusion through tho ·ttlm. A few copper indications were found, al!nost all the i:e.rtioles being in the 30 micron size group. Some other co11ection.s were made early 1n ~uly tbo.t will be e::lt8!ninod tor· 'lopper when they are treed !"roe other tests . will be examined. tor copper in the futll!'e , and 1t may be possible eventually to add so:neth1ng to tho information now presented. lil add1 t1on, oce~ional colloot1ons COllCLUSION6 REGARDING COPPER In view Qt the above fa.eta , it i,eem:, very hazardous to draw any: definite con­ clusion associating ~he coppe~- bearioo perticlos collected with the fireball or 1uly 24. Th.are a till is, hwoTer , a residuum or .eta , it i,eem:, very hazardous to draw any: definite con­ clusion associating ~he coppe~- bearioo perticlos collected with the fireball or 1uly 24. Th.are a till is, hwoTer , a residuum or poasitdlity ot such associations men 1 t is conoidored th c.t partic!.ss ot 1h c smallest s1 ze group did not appear in largo numbera until some 35 hours at'ter the po.esege of tl;le fireball . ;..=- - ~ ,,.~ tk-a~~ • ...,.. __ --- - (Roduced ~o Particlen per 102 J.itera of' Air) CountG of Copr,er Partieloa ill Colleetiotu, at Socorro During Per1o4 lul.:y 25 to August l , 1949 '?ABLB Comr Counts l • 15 M1c1·on Range 15 • .30 YJ.cron Range f ' 30' .U.cron.s Collec . Timo Date Hour Elapsed time ind* Direction knots NN\i • 9 .. , '1 '1 , tn - 9 "' "' ' •- 7 " Im • 8 NR • 6 <ft .,. r,m, -3 10 m.. - .. 2 Rf 8~ "' lit 2 I'}.{ "' "1t 7:.30 1:3() PU "' .. 7:30 AM 13. 5 13. s 17. 5 .. 35. 5 lit 'It 41. 5 lit 'ft '11. 0 77. 0 .. 95.0 • l "1t 7:.30 1:3() PU "' .. 7:30 AM 13. 5 13. s 17. 5 .. 35. 5 lit 'It 41. 5 lit 'ft '11. 0 77. 0 .. 95.0 • l 0 4 l 8 ft) 0 4 2 l. 0 0 0 2 ' ~ -20 - -::> 1 18 <-22 --> l 23 8 0 0 0 0 < ' -28 - .> l 7: 30 ~ 119. 0 s -7 4 0 4, .,/1,: • 10 "' 10 Rl lOf.,JU 10+ A4 ! 9 : 30 • 127.t> • .. 14:5. 5 l.69. 5 • + - ♦ 19,3. 0 • ESR -10 " SE - 4 • SSE • 5 • "' .. N - 6 (f---28--> 0 15 2 8.3 4 3 2 17 6 0 l 0 0 0 0 0 l 2 l 0 0 0 2 0 0 0 0 0 0 0 0 0 l 0 0 l 0 0 0 0 0 7- 25 7- 25 7-26 7- 26 7- 27 '7- 27 7-P,8 '1-29 7- 29 7-30 'l• Jl 8-1 "surt'ace ind recorded by eather Station o.t time nearast collection time . .. .. Attention is called particularly to the l arao !lumber ot small particles in one at the 145-l/2-ho -30 'l• Jl 8-1 "surt'ace ind recorded by eather Station o.t time nearast collection time . .. .. Attention is called particularly to the l arao !lumber ot small particles in one at the 145-l/2-ho-.ir collootione. The actual nl.I!lber in the colle'ltion was 140 , tor the r ive-oinute run. l.!ost of these l'lere in the size range of' tTJO to f1 ve microns • and the principal difficulty in assoctattnc them 111 th the fireball is that a five­ micron par\1cle cannot tall J!lUOh more tho.n l0 ,000 foot in 145. 5 hom-s. These part1- olea could have ccr:ie down from a greater height only it' sol:!& downward motion hfld tc.k:en place in port of the a1r 1nvolvet. It s hould be oant ioned. that collections were t aken during t be at'ternoon of Ju13' 27, at several pointa eouth end east ot Socorro , tbs fartb.eot being near Binche:a. These oolleotions ocntainod pcrtiole~ giving copper indications , the :particles being i n tho •a;?¥!) range ot sizes as those collected in Socorro at about the &a.":le ti'C'.b. It is perhaps noteworthy that the cop_per- boari ng particles 1n all these collec­ tlona were of opaque material. come to our attention 1n collection• rrom the collected in Socorro at about the &a.":le ti'C'.b. It is perhaps noteworthy that the cop_per- boari ng particles 1n all these collec­ tlona were of opaque material. come to our attention 1n collection• rrom the air have been oolored material, blue , green, red, or yellow. I.oat ot the co:;,per minerals tbat h uve previously- C OBALT AND NICKEL TESTS In the 2 t00 J.l• coll~ct i on of J"ul.y 26, three qui te re:::iarkable particles were found that save very strong coba1t indications . The particles were apparently por­ :reot spheres (at l east thoy were pori'eetly circul.ar in cross section), twelve mic­ ro!ls in diameter. The reaction with rube anie e.eid , after at!nOnia trentmant , pi•o­ dueed a dense yellow-ten halo, eixty microns 1n diameter. The color v.ao not quite the e.ppearance sU;;gestin.g e. high-cobalt com,vosition so clear es with pure cobalt: with so~ metal. prosont. Such particles are quite uniqne i n the axporionce or the present. , It' these particles wore of meteoritic orictn they cw ld, in tho absence of verticul oir IJOV«llSnt , have f'al:len a d1stO!loo of the oi·der ot 20, 000 feet 1n an i nterval or 41. 5 they cw ld, in tho absence of verticul oir IJOV«llSnt , have f'al:len a d1stO!loo of the oi·der ot 20, 000 feet 1n an i nterval or 41. 5 houra . Two particlse giT1ns nickel indication.swore round. ~ a is quite nomvl , llo ,­ ever. It anything, the number is smaller than x::ight have been expected in material of aurt'aoe ori<;in. The collections ware not given acid treatnent: additional nickel indieations might h &Te been 'i'ound it t his had been done. A oUOGEB TION hile the r&aul.ta o!' the present investiga:Uou ahould be recarded as negatt-vo or, inoonolusive, it i s desired to call attention to the faet that a coan.s ia at hand that obould r..al:a .PQAsiblo a definite demonetration of tho presence or absonoe ot cop­ per :particl es asaod.ated with events or the July 24th type . rartlo l.e collectlon equipment , operating on the s .:mie principle as that used in the i:resont inTestigat1on, and der;igned tor airple::ie installation, is on hand and 1te suco&esful operation has been dooonstrated in numeroll s sligh:ta. Provision ...... ..,,,,,, t .. could easily be made ror quickly nountins this equi~ent in an airplane cap&ble ot is on hand and 1te suco&esful operation has been dooonstrated in numeroll s sligh:ta. Provision ...... ..,,,,,, t .. could easily be made ror quickly nountins this equi~ent in an airplane cap&ble ot o.s~enaing above the 40 ,000- toot l evsl, wllieh couli teke otr soon otter an event ot the J'uly 24th kind, and fly a pattern that would ineludo n itl:. reasonable certainty sO"C!e or the nateriol originating at the neteor u-ajectory. A g_uiek approximate deteroination of the tTejeetory wo11ld be required , of course, Wld 1f winds aloft wore or considerable strength 1 t muld b& nocaseary to make due allowance tor ttlc:t:1 1n planning the :flie}lt. UOT ADDED <l-l AWUS1' 10 1 1949 : Ao this report ,1aa being 1'1n1shea, an ntte:ipt naa :oade c.t on. airplane oollection 1'ollOm.ng the event o~ uzust 6 . The oolloetins eguiPmQnt ,1as installod in a B- 25 from Kirtland Field nnd on the o.f'to:::-noon or .~ugust 8 , a flight wao ,u1e l!.«lich a was hoped m18ht intercept somo of t he meteoritic material. An Interval or 41 hours had pussed before the take-oft , 'to:::-noon or .~ugust 8 , a flight wao ,u1e l!.«lich a was hoped m18ht intercept somo of t he meteoritic material. An Interval or 41 hours had pussed before the take-oft , and the :ma:dnu.n alt1• tudo roached waa 2.3,000 i"eet. A rough attenpt was :!lade to include air tho.t wae under the trajoctory, but distanl'}eo or sevoral hundred miles nore involved. A few oopI,>o:..~ ind:!cations were obtained, but they seemed definitely to be associated mth l,o nickel or cobalt indications were ~ound. AD. 0lcJ1or­ material of surface oricin. ate stud.7, which m.tq require more upper a ir data than ls available, should be oude before 1 t is decided metber or not the t'lieht di a aotue.1ly include air that 8hould have borne FOrticles trcm tho etoor trajectory. • ' '1'0: Colonel Doyle Rees FROU: Lincoln 1ePas e Au,..i:rust 17, 1949 SUDJ"EnTs Momaloua J.uminous Phenomona. Sixth Report {attempts to colleci volatili­ sation woduots trom ~en fireballs) (1) In an earlier repori it has boen pointed out ihat in spite ot eir SDd ground searoha 1n early February elong tlle nll detem.1nad earth-trace ot the ili­ sation woduots trom ~en fireballs) (1) In an earlier repori it has boen pointed out ihat in spite ot eir SDd ground searoha 1n early February elong tlle nll detem.1nad earth-trace ot the green nreball ot 1949, ianue.ry 30th no :tregmenta of this ti:roball were recovered. 'l'here re::iatnod the _poso1t1lity "that tbia fireball had been so ooopletely Tolatilizod during tl1sht that oaly tine dnat !'ram it filtered down thru the atmosph&re. S1noe, fo::- several reasons, 1t eeerced ~ore probable that a uoh dust would consist chiefly or copper or a copper alloy rattier than ot the ferro- • magnetic aubstanoes found for ordintn-7 metoorites . the oethodo habitually enployed by metooritic1ots fo1" the c olleetion at •come duat• ( separation ot the dust trom the air by uBO or eleetroI:Ja.Gllets or permanent magnets) muld not be appropri­ ate tor use in conj]_eet ion with tho s;reon i'ireballo. It was there.tore decided to cn11nt th~ aid ot Dr. 1mpactu~.•.; duat collector f'or UDe o_n the ABrosol Projoct or tho li'ew l!enoo School (Tho 'Wr1 ter hed bean elo.:sely aasooiated, in 1943-44, with Dr. Orosier actu~.•.; duat collector f'or UDe o_n the ABrosol Projoct or tho li'ew l!enoo School (Tho 'Wr1 ter hed bean elo.:sely aasooiated, in 1943-44, with Dr. Orosier of' l!ines. at Km1 JJenco Proving Grounds mile .orking on saboted. and prorlm11;y fuoed shells and kne\7 ·that ho hrsi aat1sf'e.ctory clearance.) Dr. OrozJ.er not onJ.y agreed to partio1- pnte in a cround- 1.ovel search ~or dust pos~lbly put doun by the f'irebe.ll of' ~an- uary ,30th, but mede the valuablll sugeeation that dust oollect1oll.6 be made on plene flights routod bti.ek and rorth at high altitudes through the air benoath green t'1reball paths as soon as possible after t"ireball tall. ln this manner eonta:ni- nation ot ttle aust colleetioll8 by tar1·eatr1al particles '10Uld be reduced to a minimum. No ir:mediate application Wat:J made ot Dr. Orozter• o dust collection teohniquee • in pa1-t because ot th a m-1ter' a re11urn to fUll ttme ncade.!.11.c work at the m~ on Febru,47 8~h and in ;part baoause o~ Dr. Crozier's other ;rooec.rch e.cti'Vities and the interrUJ.)tion11 in Reoearch ttme ncade.!.11.c work at the m~ on Febru,47 8~h and in ;part baoause o~ Dr. Crozier's other ;rooec.rch e.cti'Vities and the interrUJ.)tion11 in Reoearch and Develop:iont D1v1 B1on work i.nei- dent to the A.E. O. ' a tek1ns o'Ter the ilbuqunque quarters or the Division. illiwn Orozier , \-d':l.o waa knownto 1'.ave developed a novel (2) When it m,.s determ.i?l9d th.at the green 11reball of J\lly 24.tll liod descended 1n. the im»diate vicinity o~ Soco:L"ro, it was decided to ask Dr. Cro--'1er to attempt colleotio:ns even though he and bis start were then eneaeod in tbe tinal stages ot mov1na from Albuquerque to their new quarters on the Campus ot the New 1-l&xieo School of 1!1.nes, A long distance ¢all to Dr, Orozier on J'uly 26th brough.t the weleorna news that be he.d been alerted by an appeal for observations issued by the Insti tu~ of !!otaorittos on tho evening at July 2,th end ha.d al.rood7 made du3t collections on the campus at Socorro on the morning ot J'tily 25. These collectiono , to Dr. Crosier's en.dent surprise, nre found to oontcin not 2,th end ha.d al.rood7 made du3t collections on the campus at Socorro on the morning ot J'tily 25. These collectiono , to Dr. Crosier's en.dent surprise, nre found to oontcin not only the tlrst coppe~ particles he hod 'found.in air duet col1-eot1ono bu't these I>~ticles were or unusuallt up to lOO microns in maximum dimeneiorut. On roceipt or this exciting large ai!Be - tn:to:ro.ation , a party 11u 61apatched t"ram 17th Diotrict o. ~.I. Bdq_e. to confer with Dr. Crozier ond to~makc e field search tor the i'irobcll ot :Tu.ly 24.tb. This part~ conBisted at Uajor Charles L. Phillipa (courteously ma.de avaiJ.able tor 'the trip by Colon.el Harold ~ Gunn, C.o. ot Kirtland Field) Hr. })aul Tatt of the li. S . ,eather Bureau in Albuquerque , S/A la.ck .Bolino nnd the underaigued. A conterenoe rtth Dr. Crozier end er. &,n Seely ma held on the School of w.nee cam;pua in Socorro bet\lOon 10: 00 - 12:00 A. J.1. on .Tul.y 26th. At this eonterenoe it beceme ep:parent that Dr. Crozier wao 1nolln ed to attribute the unuauall7 large copper fragcenta col - 12:00 A. J.1. on .Tul.y 26th. At this eonterenoe it beceme ep:parent that Dr. Crozier wao 1nolln ed to attribute the unuauall7 large copper fragcenta collected on .Tuly 25 at 10,00 A..l!. (-.bich because ot their size could not h&vo been blown "fer, tar by aurtace 111.nds•) to particles blO\l'D. off the root or out ot the a uttere ot t he Aseaying Building on the Campus . from the writer , Dr. Crozier replied that he would oone1der this pose1b1llty ruled out it copper pm-tioles ob.owed up in colloctiono cade in t.he open oouum at considerable distance• trCX!l the Campus . It wao tharotoro recom?;.ended th~ such oolleotions be made @d Dr. Crosier and t•.r. Seely rigged up a atonge battery combination and B!llall D.O. J!!.Otor driven 1DlJ)aotmont collector- 11h1ch were loaded into the o.s .t. etat't car and driven out through San Antonio , Carthage , and B1ngbom, No •enco (this route passing, in ~ . Taf't' o opinion, throueh the region where pnrti~les tran tile tireball ot 1ul7 24th woo ld most probably have been oarr1ed by the Tery light win.do provatlins in the reg ion ainee the ino1- dent.) 't' o opinion, throueh the region where pnrti~les tran tile tireball ot 1ul7 24th woo ld most probably have been oarr1ed by the Tery light win.do provatlins in the reg ion ainee the ino1- dent.) Four ot tho collections mode on th io trip W81"$ examined on tho eveniDg ot 1u.l.)- 26th by 1nd1stineu1chable trom :those colleotod. in Socorro at about the omne time. • Ben Seely an4 all were found to contain copper particles In answer to e. queation - (3) Pull detail.a on the mathod.e ot collection enployod by D:t-, Crozier end Mr. Seel.T and on lata:r examinations of ~e dust l)Eµ'ticles collected af'ter the graen tueballs or both J'ul.7 24th Cl1.4 August 6th are given 1n Dr, Crozier•• i-aport (R/D - tw, 8-10-49) copie11 of whieh are hereto appended. Dr; Crozier ' s tenta\1ve oonolusion trar:i study' ot the collections mal.e, not only in eonneotion with the incident o~ .July 24th, but also that o't Aucuat &tb, ts that •the reBUlte ot the prosont inveot1gaUon should be regarded as negative or inconclusive,• From anelys1a or hie r~ort (R/D - satlona with Dr. Crozier, i t io th e writer• belief' that Dr. Crozier was led to inveot1gaUon should be regarded as negative or inconclusive,• From anelys1a or hie r~ort (R/D - satlona with Dr. Crozier, i t io th e writer• belief' that Dr. Crozier was led to the abow conolwsion by the tollowing taote listed below 1n docreaelng arder or iq,ortance, md aooa:;ipanied by er! tioel OODn8ntat tw • 8- 10-49) end trom. several phone conYer­ ' 14 l.949 (.3.1) 'l'he d1scoverz by tests t:iade on or about k p t l of ., a few i . e. ten r indications~ 1n dust collected at Socorro on J oo dgre betore the men fireball 1nc1den, ot J'uly 24th. Dr. Croz er baa 1n1"omed the writer that tbs oolleotion ot July 14th wns ·care:t'lllly wrapped up end could not have becom conte?!linated by copped dWlt '1h1oh blew 1n through the open win­ dows ot the n .D. &J>. Building at Socorro attar the 1no1dent ot July 24th. I!o'7- tner , there remains the poss1b111ty- that an 'Qllol:eerved or unreported green t ire-­ ball occurring in the Sooorro neighborhood ehortly before 1uly 14