flasher - sciencenew3rd edition by s. a. graham, university of michigan. the american...

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5 5 4 9 9 9 * 4, * 0 *e** 4, S *0 S 5 0 5 4 I,* F? S S S . 5 * 4 9 S PI.~ 9 C * * 4, 9 5 * 5 9 . C C * Ii II S&2#;. ffI..9..5 S S S C * 0 6 Multiple exposure by E. F. Carpenter~ with the 36-inch telescope of thef University of Arizona on a Kodak, Spectroscopic Plate, Type 1 03a-0. Five images of L-726-8 are marked. The very bright one is No. 2. Twenty minutes elapsed between the fiRrst and last; each exposure was two minutes. * 0 4 ., . 4, 4, The case of the occasional flasher There's a nearby but faint, cool, small star, catalogued L-726-8, that seemed no different from the other unvarying stars in the heavens until its image on a Kodak Spectroscopic Plate showed an oddity. At unpredictable intervals, L-726-8 flares up by almost two magnitudes and then in a few minutes sinks back to the 13th magnitude. Photography has since caught several others in the same act. Now the world's astronomers are searching with excitement for the reason why. IIf you would like to learn about the photography of the night sky, you can get the 1 12-page Kodak book "Photography in Astronomy" ($2.75 at your Kodak dealer's). If your photo- graphic interest extends to other technologies, a copy of the new edition of "Kodak Sensitized Materials for the Scientific and Industrial Laboratory" is yours without cost. just write to Eastman Kodak Company, Rochester 4, N. Y. 9

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Page 1: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

5 5 4 9

9 9* 4,

* 0 *e** 4,

S *0 S 5

0 5 4

I,*

F?

S S S

.5

* 4 9

S

PI.~

9

C

** 4, 9 5

* 5 9 .

C C * Ii II

S&2#;. ffI..9..5S S S

C * 0 6

Multiple exposure by E. F. Carpenter~

with the 36-inch telescope of thef

University of Arizona on a Kodak,

Spectroscopic Plate, Type 1 03a-0.Five images of L-726-8 are marked.

The very bright one is No. 2. Twenty

minutes elapsed between the fiRrstand last; each exposure was two

minutes.

* 0

4 .,. 4, 4,

The case of the occasional flasher

There's a nearby but faint, cool, small star, catalogued L-726-8,

that seemed no different from the other unvarying stars in the

heavens until its image on a Kodak Spectroscopic Plate showed

an oddity. At unpredictable intervals, L-726-8 flares up by

almost two magnitudes and then in a few minutes sinks back

to the 13th magnitude.

Photography has since caught several others in the same act.

Now the world's astronomers are searching with excitement

for the reason why.

IIf you would like to learn about the photography of the night

sky, you can get the 112-page Kodak book "Photography in

Astronomy" ($2.75 at your Kodak dealer's). If your photo-

graphic interest extends to other technologies, a copy of the

new edition of "Kodak Sensitized Materials for the Scientific

and Industrial Laboratory" is yours without cost. just write to

Eastman Kodak Company, Rochester 4, N. Y.

9

Page 2: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

HOTEL RESERVATIONS

118th AAAS MEETINGPhiladelphia, December 26-31, 1951

The list of hotels and the reservation coupon below are for your convenience in making your hotelroom reservation in Philadelphia. Please send your application, not to any hotel directly, but to theAAAS Housing Bureau in Philadelphia and thereby avoid delay and confusion. The experienced HousingBureau will make assignments promptly; a confirmation will be sent vou in two weeks or less. Share a

room with a colleague if you wish to keep down expenses. Mail your application now to secure your

first choice of desired accommodations.

HOTELS AND RATES PER DAYHotel* Single Double Twin-Bedded

ADELPHIA* $5.00-$6.00 $7.50-$10.50 $10.00-$12.50BARCLAY $ 8.00-$ 12.00BELLEVUE-STRATFORD* $4.50-$6.00 $8.00-510.00 $ 9.00-$12.00BENJAMIN FRANKLIN* $5.00-57.50 $8.00-$10.50 $11.00-$13.00DRAKE $6.00 $ 7.00 $ 9.00ESSEX $4.75-$5.00 $6.00-$ 8.50 $ 9.00-$10.00JOHN BARTRAM* $3.25-$4.50 $5.00-$ 8.00 $ 7.00-$ 9.00PENN SHERATON $5.00-$7.50 $7.50-$10.00 $ 8.00-$10.50RITZ-CARLTON* $7.00-$7.50 $11.00-$12.00ROBERT MORRIS $4.50-$5.00 $7.00-$ 8.00 $ 8.00ST. JAMES $4.00-$5.50 $6.00-$ 8.00 $ 6.50-$ 9.00SYLVANIA* $ 9.00-$ 11.00WARWICK $ 9.00-$12.00

Cots added to a room are $2.50 each; dormitory style rooms (for 5 or more) are $3.50 per person.* Hotels starred have sessions in their public rooms. For a list of the headquarters of each participatingplease see Association Affairs, Science, August 24, or The Scientific Monthly, September.

Suites$25.00-$35.00$14.00-$25.00$20.00-$30.00

$18.00$15.00

$12.00-$15.00

$18.00$22.00-$24.00

society and section,

* .--------- THIS IS YOUR HOTEL RESERVATION COUPON ---

AAAS Housing BureauArchitects Building (1st Floor) Date of Application ................

Philadelphia 3, Pa.Please reserve the following accommodations for the 118th Meeting of the AAAS:

TYPE OF ACCOMMODATION DESIRED

... Single Room (s)

... Double Room(s)Desired Rate ........ Maximum Rate.

Desired Rate ........ Maximum Rate ......... Number in Party...Twin-Bedded Room(s) Desired Rate ......... Maximum Rate.

...Suite(s) Desired Rate ......... Maximum Rate ......... Sharing this room will be:

........... (Enumerate persons here and attach list giving name and address of each person, including yourself)

CHOICE OF HOTEL

First Choice ............. ... Second Choice .... ...... Third Choice.

DATE OF ARRIVAL ..... .... DEPARTURE DATE .(These m-ust be indicated)

NAME ... ........................................ ..................................... . .. . .. .

(Please print 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.

12 80nmNoZ., VoL 114

Page 3: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

IB

Y \L

II

90

to our friends,

old and new, |_

in the

AMERICAN ASSOCIATION

FOR THE

ADVANCEMENT OF SCIENCE

THE CiVe MQSOaSYCOMPANYS C I E N T I F I CP U B L I C A T I O N S

SAINT LOUIS * SAN FRANCISCO * NEW YORK

December 14, 1951 is

Page 4: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

ENGINEERING IN PUBLIC HEALTHBy HAROLD E. BABBITT, University of Illinois. Ready in March

A new text by a leading authority in the sanitary engineering field, this book is suitable for bothstudents and practicing engineers in public health. It emphasizes the breadth of knowledge requiredby the engineer in public health, showing that it involves the application of knowledge in such majorareas as civil and mechanical engineering, in addition to special knowledge required in the controlof environment.

FOREST ENTOMOLOGY. New 3rd EditionBy S. A. GRAHAM, University of Michigan. The American Forestry Series. Ready in March

A textbook presenting the techniques of forest insect control and the underlying principles of forestentomology. It emphasizes the practical and ecological aspects of the subject. Principles are illustratedby a full discussion of representative species selected from each important ecological group of forestinsects.

ECONOMIC BOTANY. New 2nd EditionBy ALBERT F. HILL, Harvard University. McGraw-Hill Publications in the Botanical Sciences.Ready in January

Evaluates the many changes brought about in the agricultural and forest practices as the result ofthe Second World War-greater production of food, increased acreage, improved methods of culti-vation and harvesting, and the introduction and establishment of foreign plants into the WesternHemisphere. Substitutions are also considered as well as the use of new and virtually unknownplants.

THE THEORY OF ISOTOPE SEPARATION. As Applied to the Large ScaleProduction of U235By KARL COHEN, Director, Atomic Energy Division, The H. K. Ferguson Company; formerly Di-rector, Theoretical Division, SAM Laboratories. Edited by GEORGE M. MURPHY, WashingtonSquare College, New York University; formerly at SAM Laboratories, Columbia University. Na-tional Nuclear Energy Series. Division III. Volume 1B. 183 pages, $2.00

The subject matter of this volume is based on the reports issued by the theoretical division of theSAM Laboratories and its antecedents. The work was done over a period of years, from 1940-1945,under contract to various government agencies. However, in some instances, special topics weredrawn from outside agencies and some of the material in the volume is new.

Send for copies on approval

BOOK COMPANY, Ic.

December 14, 1951 15

Page 5: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

HAVE YOU CONSIDERED THISOUTSTANDING GEOLOGY BOOK?

Department of Geology andGeography, University of Missouri y CHAUNCEY D. HOLMES

Introduction to

College GeologyA text that integrates physical & historical geologyand treats the entire study of geology as a unit

An excerpt from an article by Chauncey Holmesappearing in the September 1951 SCIENTIFICMONTHLY discussing the integrated approachto geology upon which the author's text is based:". . . Presenting the science with the many facetsof its twofold aspect [the physical and the his-torical] integrated into a coherent unit assuresthe student of a proper introduction to the wholefield. This is advantageous to both the general-education group and the future geologists. To alarge extent these two groups are not differentiatedat that stage. Many a good geologist has begun hiscareer by enrolling in the elementary course pri-marily to fulfill a science requirement. Nothing lessthan a full view of the entire field will enable astudent to choose intelligently. If he decides to makegeology his lifework, he is then in the best positionto understand the interrelationships of the more ad-vanced courses and the need for training in the sup-porting sciences. From the start, he is properlyoriented. On the other hand, should he decide toenter some other field, he will at least have had thecomplete survey of the science that an educatedman should have. Nothing less than this can guardagainst the narrow and inadequate idea of profes-sional geology that so many supposedly educatedlaymen now have."

* From Professor K. P. McLaugh-lin, Montana State University:"I wish to express my apprecia-tion to you for your textbook,which I used this past year. Theone usage of the book has defi-nitely proved the merit of teach-ing the type of integrated histor-ical and physical geology whichcan be built around such a text.The response of the students ismuch more desirable than thatwhich I have had teaching thetwo phases separately."

THE MACMILLAN COMPANY60 FIFTH AVENUE

NEW YORK, NEW YORKDeebr14 911December 14, 1951 17

Page 6: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

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Page 7: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

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Page 8: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

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Page 9: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

What GENERAl ELECTRIC People Are SayingG A. RIETZEducational Service DivisionPROBLEMS FACING ENGINEERING AND SCIENCESTUDENTS: We are experiencing a growing ap-preciation of the importance of an adequatesupply of well-trained engineers and scientiststo this country's immediate and future welfare.And, although this situation creates for scienceand engineering students such as you excellentopportunities for future employment, it alsoleaves you plagued by confusion and un-certainty. No doubt you find yourselves search-ing for the answers to many questions: "Whyshould I study?" "Should I continue my educa-tion or enlist for military service?" eShould Ieven bother talking to industrial recruiters whovisit the campus?"No one can deny that these are uncertain

times. But no one period can truthfully becalled normal. The young student or graduatein 1917, 1929, 1937, or 1941 had hard problemsto face, too. Life is made up of problems. Thereis nothing unique in your position.

It is not certain that military service willinterrupt your schooling. If it should, however,remember this: You, as college graduates, willnormally expect to pursue your individual oc-cupations for something in excess of forty years.Productive work is, then, a lifetime proposi-tion. All your schooling has been a preparationfor this. A period of two, or even five, years ofservice would represent a relatively smallportion of your total professional life. Itwouldn't seem wise, then, to allow such a briefinterruption to prompt unwise decisions thatwill affect your entire future.

I suppose good advice is a commodity ofwhich there is a surplus, and therefore you maynot be inclined to take it seriously. I'm aware,too, that Socrates' life was ended by the poisoncup, and he was a giver of advice. However,I'll chance it. The following advice parallelsclosely that being given by well-informedfathers to perplexed sons in school.

Pursue your studies. Go as far as possible inyour chosen field. Don't, because of uncertaintyor despair, abandon your studies. Should itbecome necessary for you to serve in the armedforces, the odds are predominantly in favor ofyour returning to civil and professional life

after a relatively short period. It will be fareasier for you to pick up the traces of studythan to start from scratch, and you will havethe jump on others who were not so wise.As graduation approaches, discuss job op-

portunities with many industrial and otherrecruiters who visit the campus. As a result ofthese interviews, you might become a perma-nent employee with promise of uninterruptedservice in a company of your choosing. Shouldyour employment be interrupted by militaryservice, you will usually have a company anda job to return to. If you should go into servicebefore employment, at least you will have theadvantage of having your record on the booksof a number of companies, awaiting yourreturn and reapplication for work.

Now, where does General Electric stand onthe employment of people like you in thesetimes? Regardless of Reserve or SelectiveService status, we want to interview all stu-dents who wish to see us. And, regardless ofstatus, we will make job offers to those youngmen and women we would like to have asmembers of the General Electric family.

Should any of these people be called intothe service before reporting to us for work, ouroffers will still be waiting for them on theirreturn.

Barring an exceptional, and unforeseen,military situation of such long duration that anabnormal accumulation of commitments doesnot permit us to meet the last ones made,those men and women already with us beforebeing called for military service will maintaincontinuity, and will be assured of employmentupon return.

We didn't have to go back on a single com-mitment following World War II. We trust wewill never have to.

Kansas State CollegeManhattan, Kansas

October 11, 1951

faz cas pAL c4LECTRICSGENERAL * ELECTRIC

Page 10: flasher - ScienceNew3rd Edition By S. A. GRAHAM, University of Michigan. The American ForestrySeries. Readyin March A textbook presenting the techniques of forest insect control and

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with theSpencer Refractometer

Quick, critically accurate determinations of refractiveindex and dispersion are easily accomplished withSpencer Refractometers. In many industries thesedeterminations are a convenient basis for control ofquality. Food, petroleum, chemical, rubber, distilling,pharmaceutical, optical, and many other industriesfind its use of great value.

One of the six types of Spencer Refractometers mayanswer a real need in your research or production de-partments. For additional information write Dept. Z2.

INSTRUMENT DIVISION * BUFFALO 15, NEW YORK

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