11'- • - REF .ID :A70100 

• 

J...~a. i :ina 11. Br.yaa 

Aas1~\ant F.d.Uor 

The ·a. ·crs ~ '.rhor.•1 Jet-rerson 

l 1rj.nceton >:1ivera1'1' !,lbra17 

:Princeton, new Jentt¥ 

434 Jfo. George Hamon Dr • 

.A.rll::igton, Va, 

11 .lll8\ld 1950 

Referrini1; 'to 113' letter of lfi Ju.17 1950, and to the 

Jetfercon Msa trapant irt the 11As!3&ahuaett1 Historical Societ7, 

I an ple:ised to enclo1e herewi tl:t a cori1 ot a letter .fron the 

.National .Uureau of ntandardc. which cl•ra up the mya,e17. 

~ino•rel.7 Tours, 

W'ILLIN~ r. :ran:mwr 

Incl. 

@'pproved for Release by NSA on 03-25-2014 pursuantto E.O. 1352a 
•• < 

- -- -----------------

• REF ID:A70100 • 

COPY 

U.S. DEPARTr1TIN! OF COMMERCE 

National Bu.reau of Standards 

Washington 25 

Ju.1.7 25, 1950 

Mr~ Willi&:1:1 F. Friedman 

424 u. George Bason Drive 

Arlington, Va. 

Dear Mr. Friedman: 

In re-ply to your letter ot July 19 to Dr. Condon I am 

returning the e.uclosed photostat. It ap:?ears to be a draft 

0£ a table for converting temperatures from the Reauma.r to 

the Fa.renheit scale. It was probabl.1' intended to be attached 

11.2/a.o 

to a ther.:ior.ieter. !l!he emct conversion formula ls F = 2.25 R • 32. 

In.closure 

Very trul.7 ;yours, 

/a/ Franz L. Alt 

Jrans L. Alt 

.Assistant Chief, 

Compntation Laborato17 
-" REF ID: A70J.PO 

.... us.. n.. 1Ji7mi 

Asdat.ant. Ed:ltor 

The P1pW9 ot Th<El88 J ettermon 

Prlnaeton Uni¥ ...S.ty L!brazo7 

Princetm, If• Jer•• 

'P9r Xrs. ~1 

r' 

Thank :you 80 tmdl for :t0Ur Y817 kind latter ot 26 June anl £or 

:I.ta incloeUN • 

I have tabtn the l~art,. ot havinc copi• BBd.e and tJwrotore 

I • returning your ori~!nal. at the tragmant in the llaasacbusett.s 

Hiat.orJ.cal Society. I had sens or rv fl'lema tm a look at t.he 

Jiiotaatat to see \tlha t th8J' can alll r4 it.J at the RUDmt • are quite 

ai:rw that it ha.I nothing to do with 017ptograp}\y. The d•1gn a8811B 

to u. ane tar a eort or Jllldallion to be 1t0m on a •t.ch cba1n. The 

tabular •ter1a'J. rum fl'OJll • 2B to - 24 Sn eta I* of 4 wd.ta in the 

R col.mmJ and all the tabl• tit the f'cmnula F • 2.25 R • lle The• 

are al.ao interpolation tabl• 11hich run trom .oo to 4.00 !n intenale 

ot .2S. I don't know \lf1at R or F represent., rw do 1 know llll7 

&f\Ylmdf 1IClild •rt- tabl• or ao a~ a .tbnction. Mental arithmtic 

will do wry niceq. Perhape I•ll haw ex111 ot 19 aet.l"Qll'1 1r Mmdl 

look at. the phataet.at,, and 1t he GllZl88 up 11it..h an answer, l'll be 

"1ad to writ.a JCJ.l• 

X 1liah to thank )'VU tor )'OIJr Worm.tion !'rm Ura. lt~ll 8V8l 

t.ho~ 1t _. negative. I have not given up hop• ent.iral.y, however, 

and ecaidav AaT tum up a bit .111ore intarmtion. Ear~ laet Mq I 

ri.lit.lld "Paplar Fara1t." and •tab111hed ocrdial. trUndahJp with t.h9 

7aing people mo live theN .now. 1'htll'8 1e a posalbilit7 t.hat --- thms _, be tound there. 

I had the pl .. ure ot -tin£ Pr. DoJd in t7aehingtan at t.h• 

\ine ot thew_. at. the IJ.br_.7 or CcmgNll•• l wieb I bad kmm 

you_.. thtr• too and I wault\ havs mde.,, pnamoe knom to you 

ao t;hat w omld haw had a oha"t;. 

Think 1Cft1 !or yo_. oourt.Mf, I m 

S1ncerel110urs, 

l Incl. TlIJl,I/Jl F • PRIEDllAll