. -

•• 

Mr. Lenox R. Lohr, President,· 

Museum ot Science and Industrj, Jackson Park, · Chicago '1' Illinois. 

Dear Lohr: 

SPSIS-3 

26.0ctober 1944. 

I was much interested in the outline of the talks 

to be given at the Museum, and.to note how 7ou have worked 

out the talk having a close relationship ·vith the subject of codes and ciphers. I am sure tbat 7our audience vill 

be h1ghl7 interested 1n the talk to be given b7 Dlt. Christ, poaaibl7 more tban the7 would be 1n a talk directl7 on codes 

and ciphers. 

With beet regards, ·I am, 

William P. Priedman, Di~ector ot Communications Research • 

pproved for R.elease by'NSA on 07-16-2014 pursuant to E.O. 

13526 
POPULAR HOBBIES 

at 

THE MUSEUM 

OF 

SCIENCE AND INDUSTRY 

·Wednesday Evenings at eight o'clock 

· OCTOBER 18 TO NOVEMBER 22 

Admission 25¢ 

Illinois Central S 7th· Street 

Motor Coach 

Street Car 

Elevated 

No. 1 or No. 2, to 57th Street 

Stony Island car to S7th Street 

Jackson Park train to end of line, 

free transfer on street car north to 

S7th Street 
The air is full of new ideas today. 

Are the doors of your mind unlocked 

to receive them? 

Have you a hobby, or are you looking for one? The Museum series of 

hobby lectures may help you find a 

new fi,eld or develop your old one. 

In addition to the lectures, exhibits 

will be on display: beautiful bindings 

'and old books, the recovered art of 

fore-edge painting, manuscripts and 

autographs, gems and rocks, needle- -

craft and woodcraft. 

There is nothing like a hobby for 

awakening the creative faculties, and 

clearing one's mind for fresh ideas 

when it is tired and strained from the 

day's routine. Many a business man 

or scientist worn out with a knotty 

problem is blessed with a flash of inspir~tion when relaxed in pursuit of 

a hobby. 

RSi"ob~Og A 7'1,~li)iiding and Collecting c.,., ,4 

II 

, .. 

.. 

·, 

J 

I 

Leonard Mounteney 

Handbinding Studio of the Cuneo 

Press 

October 25 Woodworking at Home 

E. C. Wittick 

Head, Industrial Arts, University 

of Chicago High School 

November 1 Needlecraft 

Mi's. W. F. Whitcomb 

Coverlet Guild 

November 8 Sherlock Holmes and the 

Baker Street Irregulars 

J. F. Christ 

Associate Professor of Law 

School of Business, Uni~crsity of 

Chicago 

November 15 Getting Acquainted with 

Gems 

H. Paul Juergens 

Certified Gemologist 

American Gem Society 

November 22 Manu8cripts and Autographs 

George B. Utley 

Librarian Emeritus 

Newberry Library 
() 

~ 

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PLACE 

STAMP 

HERE 
1•NK'rMl!Jlill'l"7' 

·-

REF ID : A l0-0 0, 

'-- ,, 

}Y][J§:iln~rr tD.F §~IB~CCIE ~~ill> [~.!IJ)[J§Tl{Y 

lFv11.nvlll>1m 1IBY .Jm.m§ Rm~n=~~AL!D 

Mr. William F. Friedman 

Head Cryptanalyst 

War Department 

October 14, 1944 

Office of the Chief Signal Officer 

Washington, D. c. · 

Dear M~. Friedman: 

I want to thank you for the telegram 

you sent me concerning using Cryptography as a 

subject for our current lecture series. 

97rH STREET AND SDUTH SHDRE DRIVE 

TELEPHONE PLAZA 8100 

You will be interested to see what we 

eventually worked out. Dr. Christ is teaching codes and c~phers in one of the University of 

Chicago's military courses, and it was his 

suggestion that we use either puzzles or detective 

work as one of our subjects, and he gave us .much 

interesting information on the popularity of both 

of these as hobbies. 

With every good wish and with appreciation of your courtesies, 

Leno 

Encl.