Back MatterSource: The Scientific Monthly, Vol. 71, No. 3 (Sep., 1950), pp. xi-xivPublished by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/20274 .

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New RCA overseas teleprinter service by radio, first open to the public, now links New York and Holland.

X~~~~~~~~~~~~. . ... ... ... .. ..

You are familiar with tele- ing or static-and automatically i; 0 t tS printer service which delivers a insists on a correction! ;- : typed message, by wire, at high If, when RCA's "TEX" is at work, a ;

speed. Now this useful service letter becomes distorted, the receiving S -0| Stt - on apersil-t- indstrumen rsejects the character and - l ;;

person basis, and is spanning fractions of a second -until a correct mm.

the AtanticOceaI by rdio ! signal is receivedl. Like other RCA ad-

This new achievement, calledl tronics, RCA's TEX system helps make l

TieX,rws adEveloped bnY RCA eIn- randi wnaves mnore useful to all of us-i .'. 0 m

heart is an amazing machine thlat See the newest in radio, television, and RCA Research and pioneering provide a hi k i d d t t ~~electronics et RCA Exhibition Hall, 36 firm basis for the superiority of RCA thinks~~~~ incd,dtcserr West 49th St., N. Y. Radio Corporation Victor home television receivers-the best which may have comne from fad.- of America., Radio City, New York 20. buy on the 1950 market.

Pj F AADOfO CftORAW>Opg ?'AMEsA?A

- M J Al/or/c/leadter in~ -Zc/ l9rs* I'? 7Wet'r/s/r

xi

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REGISTER NOW for the Cleveland Meeting of the AAAS

AVOID CONGESTION AND DELAY GET YOUR GENERAL PROGRAM -

BY FIRST CLASS MAIL - EARLY IN DECEMBER

Registration in advance of arrival at the 117th Annual Meeting of the AAAS in the downtown hotels of Cleveland, December 26-30, 1950, has so many advantages that we wonder why almost everyone doesn't take this sim- ple step. For instance:

1. You avoid congestion and delay at the Registration Desks in busy foyers at tinme of arrival. All indications point to a large attendance since all of the Association's seventeen sections and subsections, and more than forty societies, will have sessions with excellent programs and there will be a number of important symposia.

2. You receive the General Program early in December in ample time, un- hurriedly to decide among the events and the sessions that you wish to attend.

3. Your name and hotel address will be in the enlarged Visible Directory the first hour of the first day of the meetings, since it will be posted in Washington as soon as processed.

4. Advance Registrants will liave the same privileges of receiving a map and directory of points of interest of Cleveland, literature, radio broad- cast tickets, etc. At the convenience of Advanee Registrants, these will be distributed from the Main Registration in the Public Auditorium- the location of the Annual Science Exposition, the Visible Directory, and the Science Theatre. Admission. to the splendid series of latest scientific films will be free to all Registrants.

At the 1949 Meeting, the Council of the AAAS voted overwhelmingly to continue Advance Registration. To insure its prompt receipt, the General Program will be sent by first class mail December 1-4, 1950-which is also the closing date for Advance Registration.

-- THIS IS YOUR ADVANCE REGISTRATION COUPON - 1. Advalnce Registratioi-i Fee (the extra quarter covers part of the first class postage) enclosed:

O $2.25 A.A.A.S. Member (check one) Ol $2.25 College Student O $2.25 Wife (or Husband) of Registrant O $3.25 Nonmember of A.A.A.S.

2. FUIIL NAME (Miss, Mrs., Dr., etc.) ............................. ...I..................... (Please print or typewrite) (Last) (First) (Initial)

3. ACADEMIC, PROFESSIONAL, OR B U S IN E S S C O N N E C TIO N................................................................................................................................................................................................BSN

4. O EFF IC E O R R O M E A D D R E SS ..................................................................................................................................................................................... (For receipt of P'rogram andi Badge)

5. Y O U R F IE L -D O Fu IN TER E ST ... .......................................................................................................................................................................................

6. C O N V E' N T IO N A D D R E SS .. .................................................................................................................................................................................................... (If not knowin now may be added later)

7. DAT E OEF ARRIVTAL ..........DATE OF DEPARTURE

Please m)iail this Coutpon and yolir checkv or mnoney order for the fee, $2._20 or $3.25, to AMERICA V ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE

1515 Massachutsetts Avenue, N. W.J4, Washington 5, D. C.

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HOTEL RESERVATIONS 117th AAAS MEETING

Cleveland, December 26-30, 1950 The list of hotels and the reservation coupon below are for your convenience in

making your hotel room reservation in Cleveland. Please send your application, not to any hotel di-rectly, but to the Housing Bureau of the CleveLand Convention and Visitors' BureauL to avoid (lelay and confLision. The experienced Hlousing Bureau will make assignments promptly and the hotel will send a confirmation directly to you in two weeks or less. Please plan to share a room with a colleague. In addition to economy, this will insure ample accommodations for all in the downtown hotels. Mail your application now to secure your first choice of desired accommodations.

HOTELS AND RATES PER DAY Hotel* Single Double Twin - Bedded Suites

STATLER $4.00-$8.00 $7.00-$10.00 $8.50-$12.50 $17.00-$23.00

HOLI,ENDEN $3.50-$8.00 $5.50-4$10.00 $7.00-$12.00 $12.00-$22.00

CARTER $4.00-$6.50 $6.00 -$10.00 $7.00-$10.00 $18.00-$25.00

ALLERTON $3.50-$7.00 $6.00-$ 9.00 $6.00-$10.00 $10.00-$20.00 $2.50 RW $4.00 RW

AUDITORIUM $3.50-$5.00 $5.50-$d 7.50 $7.50 $12.50-$26.00

OLMSTED $3.00-$6.00 $5.00-$ 9.50 $7.00-$ 9.50 $10.00-$15.00

Prices are subject to change, but are not likely to do so.

RW means running water only-no private bath.

* A list of the headquarters of each society and section is undei Association Affairs, SCIEON CE, August 25 and in THrE SCIENTIFIC MIONTIILY for September.

--- THIS IS YOUR HOT-EL ;R:ESERVATI:ON COUPON- - Mrs. Louise D. Perkins, Director Housing Bureau Cleveland Convention and Visitors' Bureau, Inc. 511 Terminal Tower Date of Application. Cleveland 13, Ohio Please reserve the followinig accommodations for the 117th Annual Meetilng of tlle AAAS:

TYPE OF ACCOMMODATION DESIRED T w in -B ed d ed ....................... ........... .. R ate ....................... Suite ......................Rate . ........Number in Party. Double Room ... ............ . Rate . .................................. .. Single Room ............... Rate ..S......h............. Shlaring this room will be: .................. ... peirsons .............................................I............

(Enmnerate and attach list giving name and address of each person, including your,lself) CHOICE OF HOTEL

First Choice ... Second Choice .......................... Third Choice ................................. DATE OF ARRIVAL .......................... DEPARTURE DATE ......................................................

(These must be indicated) SIGNED

(Please prinit or type) ADDRESS

(Street) (City and Zone) (State) Mail this now to the Housing Bureau.

Rooms will be assigned and confirmed in order of receipt of reservation. Hotels will confirm directly in two weeks or less.

*ili

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Hotel Reservations and Advance Registration,

Cleveland Meeting, December 26-30, 1950

As forecast earlier in the year, the 117th meet- ing of the American Association for the Advance- ment of Science, in the Public Auditorium and downtown hotels of Cleveland, December 26--30, 1950, will be full-scale. All seventeen of the Asso- ciation's sections and subsections will have strong, particularly timely, and significant programs, which will include a number of important symposia. There have been recent additions to the number of societies that will hold their meetings with the Association.

The Annual Science Exposition, which will be held in the street level arena of the Public Audi- torium, will be substantially larger and more di- versified than was possible in the limited space available at the New York Meeting. Leading book publishers, scientific supply houses, microscope manufacturers, instrument makers, and prominent industrial concerns will have exhibits. The Exposi- tion will be well worth a trip to Cleveland for it- self alone.

Attendance at the Cleveland Meeting will be large, and it is not too soon to be considering hotel reservations and advance registration. On separate pages in this issue will be found detailed data on Cleveland hotel accommodations. Headquarters for each section or society is shown here in Table 1.

Although sufficient rooms have been promised by the Cleveland Convention and Visitors' Bureau, it is quite probable that the supply of single rooms in the downtown hotels will become exhausted. To make it possible for all who come from out of town to be housed in the downtown, or most convenient, area, it is strongly urged that those who expect to attend will plan, from the outset, to share a room with a colleague or a friend. Most hotel rooms have space for the installation of another bed. When such rooms are sold for single occupancy, not only do they cost more, but members who do not make reservations until December may be obliged to stay in a less conveniently located hotel. Suites shared by three or four persons may cost less than the single rate, and double rather than single occupancy of individual rooms is always more economical.

Advance Registration. The advantages of re- ceiving the Genteral Program well in advance of

the Meeting are real ones-provided the Program arrives early! To insure that all advance registrants shall receive their programs on time, programs will be mailed first class, December 1-4, 1950. To cover most of the postage, the advance registration fees have been increased 25?; that is, the fees will now be $2.25 for members of the Association, for spouses of registrants, and for bona fide college students, and $3.25 for nonmembers. No advance registra- tions received after December 4 can be accepted.

Details of Association-sponsored symposia, the Special Sessions, and the programs of the Science Theatre will appear later in Science and THE SCIENTIFIC MONTHLY.

TABLE 1 HOTEL HEADQUARTERS, CLEVELAND MEETING

AAAS; Press; AAAS Sections I, K, Q; AAAS Cooperative Committee; Academy Conference; National As- sociation of Biology Teachers; Na- tional Academy of Economics and

Statler: Political Science, Pi Gamma Mu; (1,000 rooms) American Dietetic Association; Na- E. 12th St. & tional Science Teachers Association; Euclid Ave. American Nature Study Society, Na-

tional Association of Science Writers, Scientific Research Society of America, Sigma Delta Epsilon, So- ciety of the Sigma Xi, United Chap- ters of Phi Beta Kappa.

AAAS Sections F, G, N (including Subsections Nm, Nd, Np); American

Hollenden: Society of Parasitologists, American (1,000 rooms) Society of Protozoologists, American 610 Superior Ave. Society of Zoologists, Society of Sys- (E. 6th St.) tematic Zoology; American Micro-

scopical Society, Society of Indus- trial Microbiologists; Alpha Epsilon Delta, Premedical Honor Society.

AAAS Sections A, E, L, 0; National Carter: Geographic Society, National Speleo-

(600 rooms) logical Society; Biometric Society, Prospect Ave & Eastern North American Region; East 9th St. History of Science Society, Philoso-

phy of Science Association; Founda- tion for the Study of Cycles.

Allerton: AAAS Sections B, C, D, H, M; (550 rooms) American Meteorological Society, 1802 E. 13th St. Oak Ridge Institute of Nuclear

Studies; American Home Economics Association.

Auditorium: Particularly convenient for exhibitor (300 rooms) personnel, since this is just across the E. 6th St. & street from the Cleveland Public St. Clair Ave. Auditorium.

Olmstet: (200 rooms) E. 9th St. & Superior Ave.

xiv

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helps adjust an amplifier Far subtler differences than shown here can have large effects on performance.

How can you remember the all-important de- tails of wave form? How can you show improve- ments achieved in the course of design changes and adjustments? How can you prove that a circuit

-_g_ .. ~long since gone from your bench behaved in a certain way?

With photography, of course. It's simple, it's indisputable, and it's permanent!

To photograph cathode-ray traces from almost any kind of screen-whether repetitive patterns or the fastest transients-just load your camera with 35mm. Kodak Linagraph Pan Film. Your Kodak Industrial Dealer carries it in 100-foot rolls and 36-exposure cassettes. Eastman Kodak Company, Rochester 4, N. Y.

* @-

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FOR ACCURACY AND PRECISION

Model BS d4i8ca7 s7o GO4877

When it's time to decide which microscope you want to own, be sure to take a look at the new Leitz Medical Microscopes. Here is precision and quality that will stand the test of time and long-run performance; the kind of instrument that will meet your student needs today, your professional require- ments tomorrow.

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