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2430 E Street

leashington DC.

Dea

Hereweth is the report which 1 You requested last lok. buingeng You up to date-on our actuvities.

with "very best negards

Sanerely

Attach

1 Report-3Pys:
2 Return Receipts

A(B,7, 5/20

may 27,1952

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Funther attempts to analyze an unknoon. sibstanec Containel in a Sgunge, assemkly suamittd by the Central Intelligince agenay.

Dur first report (Sept 1951) onthis Subject inbicated inability to ident ify the unknown substance by normal techniques because of lacrof Sample in the Collapsible tube proper.

Before neturning the afparatus to
it was carefully freed of all nesidues. The Collapsible tube, the hypo dermic necble fragment and the inner. Surfoces of the Plaste Container yillled Scrapings which when Pobled weighed about 25microgrome.

Efforts to locate worters who were shellel in measureiny Physecel Constanrs of minute traces of Muterials resulted in our Contact weth in Tanuary. 1952.

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Stated in an intewvieew at his laboratory in that he wovld be aple to obtain infra red and uetra veoeet absorption spectu from Single Crystals of an un known substance with dimensions of Crptals nolanger than o.smm kngth and: 0.05mm width:

pon neturning toafterthis inter
mew we enlisted the Cooperation of and . in
aniatemgt to Crystallize the gooled Nesibues
on Scrapings.

Early in May 1952 notified ue of their sicees in obtaining Several eryptals whose length were  0.8 mm and widthabout 0.15mm

after: notfyrng arranged to see againon May5, 1952vaminel three Crystals

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一

-with an perinental micrs infra ned pectroghotometer, obtauned prelimunary absorption Spectra whech lead him to State that the Cuistals were wethout doubt organic Chemical in nature. He aohed for further authouzation to froceed weth the Several day's warh necessary to measire the infra-red and uetra veolet . characteustics of the Crystals.

le commum coted thisto you and to F and on May 20.1952 were inforined that to report to lis. was wuthor sed to proceed and

dn the meantine. attempts are being male in to measure the refractve indices of
the euj stale, "to mabe a single erystal X-Ray
Pattern, from whith the molecilar weight
of the unknown 'Substance may be determinedc
Tho is to be done by within the Inest, 3 weeks.

C