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VOL. LIII No. 24 CAMIBPRIDGE MASS., SATURDAY, MAY 6, 1933. Complimentalr-VO . o.·

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i DIRECTORY I

|Dr. Hlmrtress Pl~eparing ChPemilumineseence

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lvicture'l'aken by Illumination of 'SCold Light '

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DR. E. H. HUNTRESSTO DEMONSTRATE

HIS 'COLD LIGHT'"Luminol" Gives Enough Light,

When Oxidized, To TakePicture

SUBSTANCE KEPT SE CRET

Chemiluminescence, or the produc-tion of "cold" light by means ofchemical reaction at relatively lowtemperatures, will feature the CourseV exhibit today. Recent discoveriesof Dr. Ernest H. Huntress make pos-sible this startling and remarkabledemonstration.

An organic substance which Pro-fessor Huntress has kept secret underthe name 'luminol", i-s o.xidized in amildly alkaline solution. Although thereaction occurs at a temperature solow that a piece of ice in the solutionwill not mnelt, enough light to take apicture is produced.

In the accompanying picture Dr.(Continued on page six)

CHINESE A1BACUSESW\ILL BE DISPLAYED

Abacus Wias Used By Ancients,.3000 Years A-o

HowN the Chinese 'have added, sub-tracted, and -multiplied for the pastthree thousand years wrill be shoewnbv- the Mathematics Departmnent inits Open House Day exhibit of aba-cuses and more modern versions ofthe calculating machine in room 4-138.IThroughout; the dlay members of the

|department wtill present demnonstra-|tions designed to amuse and inform|the -visitors.I

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Progress inDepicted

Gi ren

'I'echnlique Rush, Tech Field.'l'rack Mleet-Alaine vs. Technlology, Tech

F;ield.C'rew Races, Charles River B3asin.'r'ea Dance, Walker Memnorial, afternoon.Miusical Cluts Recital, Walker Memorial,

" ening,Activities in Walker Memorial.'J'RIE T1ECHI Exhibit, Rm. 2-132, Rm. 3,

WNalker Memorial.Insbtitute Libraries Open.ISfilitary Equipment, Hangar.J Lacrosse Gamie, Coop Field.A \inlor Sports, Walker Gymnnasium.COUJRSE I: Rm. 1-34i, Model electric

nal'ills; Rinl. 1-238, accelerometer and seisrno-gralph; B~uildling i, 2nd floor, surveying in-' trunllenlts, draw.iing>, and models of structuresadbridges.COURSE I1: Rin. 1-(010, 1-110, 1-210. 1-310,

;testing materials lab~oratory, test-. (vi timbers,liard~ness, coucrete, ropes and savire; Rrn. 3-050),3 l1t), 3-250, steani1 andl hydraulics laboratory,turbjines, steamll engines, steamn tests, hy-

S tratilics, tests; Rni. 3-3;0, machine tool lab-ioratory, sqularedrill, millers, punches, drillers;

ltli. .3-313, 3-311, 3-329, textile laboratory,fabrlic testing, ctolo testing, textile niachlin-ery; Bui ldings 4-1, refrigeration laboratory, aircond~itionling, household refrigerators; Building3i, Rtins. 35-l SO, 3. -17;, 3.5-250, forge shop,foundl~ry, and~ paltter-l mknllilg shop; Rni. 3-440,(\I.aftillg and design.

COURSE III: Buildinlg S. basement, blastfurnace; 1st floor, stamp crushing mill; 3rd

\}floor, fire assaying of gold ore; 4thl floor, heat,treatinga anal netallography.

i COURSE IV: Ruin. 1-230, architectural wYorkof studlents.

! COURSE V: Rin. 10-275, chernihimines-cence, Rml. 4-151, 4-161, 4-251, 4-261, fresh-man chemistry laboratories; Rmz. 3-310, de-pxressiont plants; Rni. 4-440, -vactium distilla-tion;- Pin. 4-465, Mercury purification; Rrn.4-047, gasolene, distillation; Rrn. 4-009, mtloltensteel pouring.

COURSE VI: Rm. 10-338, "mechanicalbrain"; Rin. 10.395, network aolalyzer, highvoltage research; Rm. 4-317, electro-gardio-graph- Rm. 10-303, 10-322, 10-385, communica-tions laboratory, telegraph instruments, ampli-fier; Rmtn 10-0)23, 10-271, illumination labora-tory, sl~ectro-p-hotorneter, photo-electric alarm,photo-electric cells, thyratron dimmer; Rm.10-046, sojund research-; Rm. 10 050, 10-150,dynlanio lab~oratories, DC and AC generato rs,hotlsehokl appliances, induction furnace, high-tenlsion1 Iiiie, telephone excchallge; Rin. 10-16(),cosmlic-lray telescolpe. electron measurement,11401l-vtoltage exhlibit: Rin. 10 250, stroboscope,'high speed motion pictures and cameras; Rm.3-003, mlanutfacture of vacti-ti tubes.

COUR9SE ..VI-A: Rni. 10-267, teletype-wvriter s, r~ilv%.ay safety devices, model bydro-electr-ic station.

COURSER VII: Rnll. 10-470, trout ponld,Rlll 1l)-475, balctelia pattern;- Rni- 10-411,

.,ii-r-coic Filru ; Rtn. 10.490, human anat-iomlly; Ott. 1() 4GO. freezing foodls.I

COURSE VIII: Btuiklding 6, Eastinlan lec-tilic llall, glass- b1lowinsg 1st floor, 100,000 voltsgenerator; 2nd floor, atomic light; 4th floors x-rays, election diffraction; basement, metalIevalpolatioll, spectroscope, sp~ectrogrpah, inter-|ieromleter; Building 8. basement, photo-l

(Conti-2ued on page six)I

To Feature Afternoon'sAthletic Events

J. E. R-yan To Blow Glass ShipsAnd Shape Scientific

Apparatus

Blowing intricate glass ship modelsand laboratory apparatus will beKhown as a part of the Open Housedemonstration today from 2 to 10o'clock in the new Eastman lecturehall. J. E, Ryran, Institute glass-blow er who will display his handi-work, has worked at this occupationfor twenty--five years.

Besides making a ship-model in theafternoon and another in the evening,Mr. Ryan will do work covering sci-elntific apparatus, neon glassware, andfanci- blowing including birds, dogs,and deer.

Worked Wmith Famous ScientistsWhile Wrtorking at his ancient trade,

MIr. Ryan has met some of the mostfamous scientists of today. Amongthem may be named Langmuir, Stein-metz, Rutherford, MaTconi, and Milli-kan. Mr'. Rvan constructed much ofthe special apparatus that Langmuirused in his experiments. Among otherthings he was the first to make a highvacuum condensation pump.

Although lie was stationed in Wash-ington as a member of the ChemicalWarfare Service during the World

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Freshman R. O. T. C. MenGuide Wandering Visitors

Plain and fancy coal-shovel-ing w-ill feature one part of thespecial exhibit being staged to-day by freshmen in the Insti-tute's R. o. T. C. Unit. Only afew first-vear mend however,w-ill show their skill in thisphase of the work, most of thegroup having been assigned to,guide duty about the buildings.

The liveried youngsters willbe posted at strategic positionsaround the Institute and will di-rect, visit-ars to points of interestduring the day.

James E. Ryan At Work On AnIntricate Piece of Apparatus

WU~ar, Mr. Ryan alas gassed as a re-sult of someone's negligence. One dayhe was given a tube to work zithwhich had not been flashed out afterbeing used in an experiment. Smalltraces of highly poisonous gases senthim on sick leave for six weeks.

A Record ofContinuous News Service

*-- forOver Fifty Years

Ogfficia UndergraduateNews Organa of

Massachusetts Instituteof Technology

TODAY20,000 ]tIO

TENTHC HOUSES* 0

cientificby Vari

by Plrof0

Researchd Exh~ibitste

,ssional CoursesSPORTS, STUDENT

ACTIVITIES OFFERVARIED PROGRAM

Trlack Aleet, Technique Rush

TEA DANCES IN WALKER

Miniature Railroad, MVodel OfCape Cod Canal Among

Displays

Twventy thousand visitors from all

palts of the eastern United States are

expected to attend the magnificent

pageant of science and engineeringwhich will be presented this afternoon,xhen Technology throws open its

doc-rs to the public in its tenth annual

Open House.Hundreds of experiments and ex-

hibits dem onstl ating the very latestachievemenlts in all fields of appliedand theoretical science Twill be offeredwhile pzractically all of the Institute'sregular laboratories will be in fulloperationIl throughout the day.

Many Exhibits SpectacularOpen House will present a pano-

rama of recent progress in-technicalfields, the various departments of theInstitute having prepared their nostspectacular and interesting demon-stlations for the diversion of theirguests.

Student Activities Busy

I isitors whrill also be accorded an op-portunity- of -iewing student activi-ties and athletics during the afternoonand evening. At two o'clock Technol-edgy and the UTniversity of Maine willhold a track meet on Tech Field, afterIwrvich will come the tradlitional Tech-nique Rush for free yearbooks.

A lacrosse game on the Coop field,and a reviee of minor spo-rts in the{Ualker Memorial Gymnasium willcomplete the athletic program. Therewill be a Tea Dance in the gymnasiumbetween the halves of the sports ex-hibition.

EXHIBITS SHOWN IIN BUILDING 35

Display Going On, IsolatedFrom Cenreal Group

Of Buildings

WhNile the G-eat bull; or the ex-

hibits are being held in tle maingroup of buildings, far removed from

this group, in Bxuilding 35 situated onVassar street, separate exhibits are

being given by students in the

courses of Feundry, Forging and

Pattern Makin- of the Mechanical

Engineering Department.In the FoundrT,, Room 35-250, na-

chine moulding and Aluminum cast-

ing are exhibited under the directionof Jeremiah F. O'Neill and Claude H.Clark, instructors. Visitors wx-ill beable to follow the progress of castmetal from pig to finished product.

NTovelties Distributed in PatternShop

In the pattern making shop, Room|5-175, unier the direction of theabove men, students continue makingsouavenirs, which they began several|wceekcs a-o. These souvenirs, whichinclude table lamps, curtain rods,loving cups, candlesticks, rolling pins,and other unusual miniature wooden

,articles, will also be distributed tovisitors.

HIGH SPEED FILMS SHOWN IN 10-250

Unsuspected F'acts Revealed ByCamera Developed Last

Fall At Institute

Aloticln Tiietures, taken at a speed

of 50() frames a second, will be showel

tcdla- il Room 10-250 at 4:00, 5:00,

7T:(0, 8:00 and 9:00 o'clock.

These pictures are male possible by

research done last fall at the Institute

by Professor Harold E. Edgerton and

Kenneth S. Germeshausen, '31 of the

Electrical Engineering Department.These men have invented a method of

synchronizing the intense light sourcecoming from a stroboscope with filmpassing the lens of the camera at therate of 2o0 miles per hour.

Milk Drop Shown in SpatterAmong the motions which will be

slowed down to normal projectionspeed are photographs of a drop ofinilk dropping into a container ofmill;, an electric light bulb beingsmashed by a hammer, a snake'stongue darting, fater flowing from ajet in apparent steady state, and aribbon fluttering in the breeze. Manystartling observations are madethrough the aid of these pictures, andmany facts are revealed whIich couldnever have been predicted with theaid of the human eye alone.

Glassblower Displays HandicraftBy Making Intricate Ship Models

Saturday, May 6, 1933.

Breaking Tests On ConstructionI ~Material Shown In N~ew Research

THE TECH-Pa-ge Two

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NIASSACHUSETS INSTITUTE OF TECHNOLOGY

EDITORIAL DEPARTMENTEditorial Board

R. J. Dunlavey, G.E. A. Michelman, G.

C. W. Finnigan, '34 W. H. Wood, '34S. T. Martin, '34 D. V. Rubenstein, '34

Associate Managing EditorsDavid Horvitz,'34 RichardTaylor, '34

Associate News EditorH. S. Mason, '35

News WritersR. J. Marks, '36

Associate Sports EditorW. M. Ray, '35

Features WritersP. H. Ware, '35

Photographic StaffW. H. Brockett, '35 E. V. Beede, '35

ReportersJ. A. Bartol, '36 A. A. Carota, '36G. C. D~unlap, '35 E. P. Eberhard, '36A. E. Hittl, '36 S. Levine, '36A. V. Mackcro, '36 R. D, Morrison, '36R. L. Odiorne, '36 F. S. Peterson, '36W. H. Robinson, '36 L. C. Young, '36

E. H. Scheftleman, '36

BUSINESS SERVICE DEPT.D. F. Cobb, '35, Associate Manager

.S. H. Mieras. '36 R. G. Thompson, '36

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MANAGING BOARDW. R. Churchill, '34-........General ManagerW. L. Wise, Jr., '34 ................... EditorC. S. Dadakis, '34 ........... Managingf EditorN. B. Krim, '34 ............ Business Manager

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Visitors May Examine SectionsOf Tested Bricks Under

Microscope

Building materials of brick and-mortar will be submitted to a series of-exarninations and breaking tests in a-demonstration to be given today in~Room 4-033 by the Building Construe-tion Department. Visitors will be al-lowed to examine sections of the broken materials under a miscroseope,and attendants will explain theecauses and nature of the breaks.

Tlle Mechanical Engineering de ME

partment occupies building three andapart of building one, and each de-Ipartment will have one or more e-K- Fehibits today. -

On the third floor is the MachineTool lab, with 190 modern machine LEtools. At least one of each kind will Ibe in operation, and students will be!glad to explain their functions. The LP

visitor wvill be interested in a devices&which does the apparently impossible,Iand drills a square hole. Fine meas- Euurinlg devices and automotive produc-tiOll lachinles will be explained.

The Testing Materials lab takes u all four floors of the adjoining ell of Ebuilding one. On the first floor are timber and rope testing experiments. The second floorl tests miscellaneousethings, including the hardness of vari- FEouls substances. On the third floor ma- terials are tested at high tempera-tures, and by analysis by the photos elasticity- method.

and will keep true to its fundamentalpurposes. H-e say s graduate work isbecomning of greater relative import-ance at the Institute because of theincreasing advances made by science-of all sorts. There is no mistake inllsuch a statement. 1^

Five other articles complete the kacco-unt of life at the Institute. Linturn are presented the undergradu-ate activity, nowv responsible for Ope -House; applied research as it is car-ried on at Technology; and the wvorkof the engineer.

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W HEN there's something doingFlVevery hour -how the hours fly!E.On United States and American i

Merchant Liners you'll find your owncrowd aboard, en joying fun that'splanned for Americans.

For only $90 you can sail on a|roomy, comfortable,"one class"Amer- ican Merchant Liner direct to London

...for $102.50 you can sail in Tourist Class on the Was-hingtont or Manhattan - the fastest Cabin liners in the world; for $108.50 you can sail Tourist 'Class on the monster express liner 1%Leviathan. And in Europe $3 to $6 a|day will cover living and travelingiexpenses amply. I

UNITED STATES LINES'AMERICAN MERCHANT LINES lRoosevelt Steamship Co., Inc. A ..

General Agents wmoc"

563 Boylston St.. Boston AAgents Everywhere \"al

* A..' . '....'.* .. .*L

Imr1a�wM.

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Officia NewsOrgatn of the

Undergriaduatesof M. r. T.

A Recordof Continusous

News Service farOver Fifty Years

In this corner, ladies and gentle-men, is a special exhibit of whatbrains can't do, or what no brainscan do. This department is run solelyfor the amusement of its author'spoor beknighted brethren. Theiramusement is deri-ved from the effortswhich they expend in trying to guessjust who the Lounger is. Occasionallythey read his work, that is, after theads and all the notices have beenperused to extinction.

Despite the fact that oulr marblefacades give to somnething which hasbeen aptly compared to a factory, anddespite the fact that these same floorswhich you should now be treading,have been fiendishly designed to mnakethe human feet ache the faster, inspite of these handicaps, there are oe-casionls which make all *^o:rth while,and it is the likes of this I nowa re-late.

There wvas a certain professor in acertain department who wuas noted forthe strictness with which he keptclass. It w~as not at all unusual to findthe door locked at twernty after thehour, and several lates on the recordlwere a matter of grave import, inso-far as the marks where concerned.

Nown it so happened thtin one olthe classes of this IProfessor there aurasenrolled a student, notorious for hisagile mind aind daring remarks. Hewvas also known fox his indifference tothe formality of class hours. And' every time that he appeared late forthis professor's class, the class wasinterrupted whdile the lad wvas qules-tioned and puablicly- embarrassed.

One morning he appeared on thescene latter than e-ver. Eye witnessessay- that there wrere only fifteen min-uta; left of the hfour. How ever liestrolled nlonchlalantly in, and seatedhimsel' dlifidie-ntlv right under theprofessor's glaring eye.

''Harri-timph,' hie intoned, "-NowXwvhat has kept you this morning, M~r.

?"And proceeded to look asnasty as a professor look~ing nasty.

"Well, Professor Schnitz," begallthe boy, "It's really quite a longstory, but you see-. I went tox bedearls- last night, professor, afterstudying your lesson llard, and aroseearly this morning, just so I could behere on ti~nle and fresh as a daisy.After a brisk walk I had an invigor at-ing shawer, professor, and thence to>a piping hot breakfast, with ev ery-thling coming just according to sched-ule.

"And everytling went along justright, professor. I even had all thestop lights with :me on the way toschool. That is, all the lights saveone. Just as I drew to the other side.of the bridge, traffic was halted, andas I stopped with it, an enormoustruck drew alongside of my car andthe driver leaned dowvn and said tome, 'Say, do you go to M. I. T?' AndI said, 'Yes.' And he said, 'Do, you

know Professor Schnitz?' And I said,'Yes, what of it?' And he said, 'Well,he's a son of a ~.' And do youknow professor, it took me just onehour to catch that man."

Sometimes-, however, the backlashcomes the Dther -way. Consider thecase of our friend who was involvedin a language class, and had just hadsomething pointed out to him aswrong, by the instructor.

"Well," he- said, impressively, "Inevery other language I ever studied,1

OFFICES OF THE TECHNews and Editorial-Room 3, Walker

Memorial, Cambridge, Mass.Telephone, University 7029

BusinessRoorn 302, WalkerTelephone, University 7415

Printer's Telephone, University 0194

SUBSCRIPTION, $2.50 per Year

Published every Tues. and Fri.during the College year, except

during College vacation

Entered as Second Class Matter at theBoston Post Office

Member Eastemn InltercollegiateNewspaper Association

ASSOCIATE BOARDH. H. Dow, '35 ................ News EditorP. G. Herkart, '35 ........... Features EditorW. H. Stockmayer, '35....Sports EditorM. A. Porter, '35 ............ Make-up EditorD. Stevens, Jr., '35 ......... Advertising Mgr.J. D. Hossfeld, '35 .......... Bus. Serv. Mgr.J. D. Loomis, '35 .......... Circulation Mgr.

Wmmmpm ws v

Giant Material-testing MachineCIRCULATION DEPARTMENTE. L. Pratt, '36 E. Koontz, '36

T. E. Nv. ContainsVaried A rticles

On Open HouseA DVERTI SING DEPARTMENTJ. L. Fisher, '35, Associate Mgr.

J. D. Gardiner, '36 W. Sherburne, '36I. S. Underhill, '36 R. Reichart, '36

Prlessident Kiarl Taylor ComptonWrites On "The Institute

Of Tomorr ow"

Rigllt to the point is the May issueof The Tech Engineering News. A&special Open House olffering, its pagesare as divperse in content and as in-teresting to read as the exhibits aboutthe Inlstitute are to -see. Articles byPresident Karl T. Compton and Vice-President Vannevar Bush describe theeducational purposes and policies ofTechnology. For those -visitors inter-ested in the Institute a copy would bewell worth having, and worth keeping

as a souvenir of Open House.President Compton's article, entitled

"The Institute of Tomorrow", isstamped with the character of thescientific man. In a very definite andlucid style he presents to the publica description of where the Instituteis going, and shows that it 'has kept

CAPITAL FOR BREWER\-Tro equip small modern breweries in

Cambridge. Tech man heads manage-ment. Has had years of practical breiv-ing experience as chelnist and biolo-gist in largest brewery in New Eng-land, plus unusual merchandisingknowledge. $30,000.00 needed, prefer-ablyr fromn mall witll sound financialtraining to serve as treasurer. Excel-lent profit opportunities. Address Dox:764, THE TECH-.

it's that As ay." The instructor stoppedand considered. It w as o bvic-us thathe was thinking of the analogous casein at least ten other tongues, whichincluded Hindustani and Sanskrit, onemight suppose.

The instructor, looking puzzled,then addressed 'himself to our friend."Well," said he, "I don't recall anyothers as you say." Then an after-thought struck him. "Oh, how manyother languages have you studied?"

Our friend's face took on a crimsonhlue. "Why, er-er," he hesitated,"Only French so far."

I SYMPHONY HALL

TONIGHT-8:30

Arthur Fiedler, Conductor

Seats 2 Weeks in Advance

4

Chicken a la King DinnerThree-Course Steak Dinner

45c60c

Open 7 A. M. to 3 P. M.

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ENGINEERINGWIAT do you expect to g-ain from an engineering education?VVA group of graduates, from engineering, schools, members of

Tau Beta Pi, has expressed the opinion that the habits and view-points formed in college were the most important part of theiredulcationl. Knowledge acquired and methods learned are second-ary in importance. For this reason they believe that the engin-eering colleges should improve their teaching methods r ather thantheir curriculum or their equipment.

On reading other Teports bay engineering graduates we findfurther demands for improvements in teaching. To benefit thestudent, the teacher mnust be bothy inter ested and enthusiastic. Ifhis main interest takes himt away frtom the classroom he is boundto be ineffective.

Engineering training offers. many advantages which are pe-culiar to itself. The student learns to work hard and efficiently.He is brought into contact with others who are en-aged in seriousstudy. He learns to think in a logical manner. These are advan-tages which he may not be able to have at another college. Blutin choosing an engineering school he has been forced to give upthe superior histruction which lie might have had elsewhere.

The training given by an engineering education hlas many ad-vrantacres over one of a strictly "liberal" nature but the adminis-trationl of this trainlin- in our en-ineerina schools minimizes themto a serious extent.

THEY'RE NOT PLAYTHINGSL!OME twenty-five thousand people today will crowd into exhi-S bition looms and watch queer little gadgets go round, or gaze

open mouthed at spectacular demonstrations in chemistry andphysics. Each will find a good many things that will puzzle him.Some of the phenomena will not have the slightest meaning tothe untrained mind. He may look at the demonstrations andwithout understanding their true significance, place them in thecategory of mere playthings, the product of an imaginative andfertile scientific mind. In this he is wrong on two counts. First,the exhibitions, though they seem but toys, have astounding la-tent practical value. Second, the displays are not the product ofone brain. The working theories behind the demonstrations havebeen formulated and developed over a number of years. Scientistshave handed down the basic principles which have been expandedand developed bay modern workers.

To illustrate the above statements let us look into the develop-ment of our mzodern radio systems. They are the result of Mar-coni's playing with the wave theory of Hertz and thus conceivingthe idea of transmission without the aid of wires. When he firstdeveloped the idea, the scientific world was skeptical about hislittle toy. In fact, lie was termed a "presumptuous boy." Whenhis inventions proved so outstandingly successful, the scientistswho had previously ridiculed him, crestfallen, accused him. -ofprost tuting science by demanding money for the scientificachievements of his predecessors. Whether or not he has beenuntrue to science is a question of ethics, but it is undeniably afact that he had but developed the theories passed down to himby those who had -one before. Vol1taire hlad discovered the elee-tric battery, Arago had perfected a magnet, Joseph Henry had in-sulated the wire and made the magnet work from several milesdistance, Morse preceded him with the telegraph, and Hertz haddeveloped a theory of wave propagation. All these scientists con-tributed to the store of knowledge which Marconi needed to bringforth his outstanding contribution to communications.

These -demonstrations which are now in progress should beviewed with the understanding that they have some recognizedor unrecognized practical application, and that they are not theresult of one man's investigation.

LAb IN

ro r $90!O

ind be gaf call the way _t

LYDIA LEE LUNCHEON136 MASSACHUSETTS ALVENUE

Oppo-site Aeronautical Bldg.

Luncheon Specials for Open House Day

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I- Cg I -P-·l I II -I a e I-III

Will Be Destroyed Under High Pressure Today

-a -- I 1. I -- I , _I __

ARPTHUR D. LITTLE, Inc.Chemists and Engineer s

E A glance at the times turned in by the three heavy Engineer crews ine Compton races last Saturday gave us a real surprise. Over the mile andlree quarters, the freshmen made the best time, next came the junior var-it, while the varsity boat was the slowest. This apparent paradox becomeslearer when weather conditions are remembered, ho-ever, for the wind

as much worse later in the afternoon.

We contribute a belated notice on Charley Hall, former cross--ountry star, who left school in February. Running against a strongfield, Hall captured the fourteenth annual 10-mile run of the O'Con-nell Post American Legion in Jamaica Plain on April 19. The formera 'echnology Rash, who holds the freshman mile record, won by oneyard after a great struggle with Linden Dempster of the NorfolkY. At. A. The Newton boy's triumph is just another of the manyfeather's in Oscar Hedlund's cap.

Another alumnus Joseph Levis, '26, recently captured the national failsencing championship for the third year in succession. Levis, has ranked asne of the country's leading swordsmen for some years, and has twice rep-sented the United States in the Olympics.

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The track meet with Maine today should be very close and will undoubt-edly give the Open House visitors plenty to watch. Dick Bell will be enteredin the dashes and should be able to win both the 100 and 220-yard events.Powever, the Maine team is strong in the weight events and the longer runs.Walt Wrigley looks pretty good in the broad jump after nearly winningthe Greater Bostons last week, while Ed Pierce and Charley Hill should also,core some points.

Crew enthusiasts have enough to amuse them this afternoon,with three races scheduled on the Charles. The second 150-poundi arsity, the 140-pound freshmen, and the second freshman heaviesswill each race rival boats from Harvard. Meanwhile, the first fresh-| an boat, which has been improving steadily of late, will tackleGroton on the latter's home course.

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DRIVE THERE INA SM\iART NEW

CARDrive a '33 Chevrolet! Lowrates by the mile. No depositrequired from students. 24-hour service.

H1E: R T Z DRIV- UR-SELFHERT ~SYSTEMLicensee

U-DRYVIT AUTO RENTAL CO., Inc.6 BELVIDERE ST., BOSTONCOMmonwealth 5700

Tech Station: 16 HAYWARD STNear Kend'al Square

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length of the tube protrude glasstubes in which colored water isplaced. The pressure of the watelflowing in the tube keeps tle coloredwater in the glass indicators at a cer-tain level. According to the wellk'lnown principle of Bernoulli the pres-sure *ill decrease as the bore of thepipe decreases and consequently alower level of colored water will befound in the indicators near the nar-rowed part.

There is also an experiment incounter-cur rent absorption of iodineIrom w ater by carbon tetrachloridle.

G( eology DepartmentGives Story of Past

.; Illustrating the story of the ele-

Ihant, the horse, and the dinosaur, to-

etlher with that of many sea-crea-

ures, a display of animals of the pastnd present is exhibited on the thirdfor of Building 4 by the department

of Geology.

One of the largest crystals of plati-um ore ever found is among the ex-

hibitions of ores of diamonds, gold,

silver, and other genms and preciousmetals.

In the Geology Laboratol-y there isa c>mplete ranke of geophysical pros-pecting instruments employed in find-ing ore bodies and oil fields, and forindicating depth of soil above bedrockin civil engineering foundation prob-lems. This apparatus includes a mod-ern magnetomnieter used to measureslight differences in the magnetism ofrocks; a portable power plant for in-ductive electrical prospecting; and ap-paratus of the latest type resistivityelectrical prospecting.

CHARLES H. JOHNSON!i

M. I. T., '05

Manager Branch Office

New England Mutual Life Insurance

Company

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iIIi

INDUSTRIAL RESEARCHRLepor ts

Analyses and Tests140 Congress Street Boston

.30 Chakles River Road Cambridge, MassachusettsTelephone Liberty 05;3

THE TECH

IIII DURALLUMIN FOR

'PLANES TESTEDTesting to destruction of a twelve

foot duralumin cylinder constructedalong the lines of an airplane fuselagein a 100,000 pound testing machine isone of the features being presentedtoday in the Testing Materials Lab-oratory, Room 1-210. The test is be-ing carried out by the AeronauticalEngineering Department under thedirection of Professor Joseph S.Newell.

The cylinder, weighing four hun-dred and ten pounds and measuringthree and one-half feet in diameter, issupported at the ends. Pressure fromthe testing machine is applied at twopoints near the center.so as to obtainpure flesure with no shearing forces.A study of the properties of all metalairships is miade possible by the air-plane fuselage construction of thespecimen.

Givtes Demonstrationnof Venturi Meter

For its Open House exlibiti>n inRoom 2-110 today the Department ofChemical Enginecring is featuring ademonst ation of the venturi Meter.In this demonstration water will flc.-

through a tube narrowed in the inid-dle to about one-fourth of its originalsize.

At fr equent intervals along the

I)uraluminum Cylinder To Be Tested

IdwAlkh.. O ~~AF_

A.L'L~~~~~~~~~~~~~~~~~ROOsMS AMR& EAkN TI mHP| . He AI 0

12:00 NOON TO 8:00 P. M

MAIAN HALL

CAFETERIA SERVICE

GRILL ROOM

WAITRESS SERVICE

FACULTY DINING ROOM

WAITRESS SERVICE

NORTH HALL

CAFETERIA SERVICE

Trmu IarIe X' D~~~INING HALL

Walker Mlemorial Building

Page SixI~ ~ ~ ~

Patriotic BacteriaMake American Fk

Colored bacteria will form the I..erican flag in Room 10-475. Tflag was made by arranging the vaous micro-organisms in the requirpattern on gelatine plates upon w-ni;they multiply. In the same room v-be shown a few of the animals upwhich vitamin and other tests are [-ing conducted at tle Institute. G;thousand white rats are used for eperimental purposes.

Conducted by the same departniermovies will be shoan continuousl-Room 10-411.

a i, I, --

Rube Goldberg Mouse Trap Costs 100 Times as Much asSpring Trap

-- -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

MICE PUT ON SPOTBY BEAM OF LIGHT

Sound Transmitted By Means OfElectric Are Beam Also

In 4-010

Along the same lines as the famousRube Goldberg inventions is the "LaPaconi" mouse-trap which is beingdemonstrated today in the RadiationMeasurements Laboratory. Accordingto, the inventor a mouse runs from ahole to a place marked by a cross andcalled appropriately the "spot". Ashe arrives at the fatal position he in-terrupts a beam of light from a photo-electric cell. This action trips a relaywhich in turn causes an electro-mag-net to set off a small cannon.

A small pellet flies from, the cannonto the spot marked "X" and themouse is accordingly disposed of. Itis not expected that this invention willhavre any commercial use even thoughit nearer fails to hit the mouse, as itscost is one hundred times that of theordinary twenty-five ceint trap.

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Saturday, May 6, 19-

DIRECTORY

(Continued from page one)

electric mouse trap, invisible light, talkingarc; 2nd floor, color analyzer; Building 4, 3rdfloor, optical instruments.

COURSE X: Rrn. 2-110, Venturi meter,Godini absorption; Rm. 2-010, wind tunnel,vacuum pump, cracking of methane.

COURSE XI: Rm. 1-345, model sewagedisposal system.

COURSE XII: Building 4, 3rd floor,fossils, ores, strata, other geologic display.

COURSE XIII: Building 5, 1st floor,Nautical Museumnt Naval library, yachts; 2ndfloor, model cutting, 4th floor, drafting, de-sigsn, pictures.

COURSE XV: Rm. 2-145, Castype, type-settinlg machine.

COU:RSE XVI: Building 33, basement, windtunnel plane tests, airplane control tests, in-struments, streamline modelling; 3rd floor,soaring gliders; Rm. 1-210, duralumin de-struction test.

COURSE XVII: Rm. 4-033, brick andmortar testing; Rm. 1-010, concrete making;Rii. 1-230 building frames.

COURSE XVIII: Rm. 4-13S, Chinese cal-culators, computators.

ENGLISH DRAMA COURSE: Rm. 2-190,presentation of plays; Walker gymnasium, 3rdfloor Walker Memorial, evening presentationof plays.

Waiters AttentionA novel training course is being

conducted by the Syracuse universitycafeteria. The purpose is to trainstudents who wish employment, inthe fine points of banquet service.

Creamed Chickena la Hing

Sweet Potatoes

Roll and Butter

ci CGeorgian Cafeterias

I CHE:MILUMINESCENCE(Continued from page ont)

Huntress is shown performing the ex-periment. An idea of the light evolvedmay be gained from the fact that inthis particular demonstration the con-centration of the "luminol" was

0.006%. Mr. Charlesthe Department ofthe picture.

M. Wareham ofChemistry made

Considerable curiosity has beenaroused in speculating as to the ident-ity of the substance that is used.

Dr. Huntress will perform his che-

demonstration three3, 5 and & o'clock in

miluminescencetimes today, atRoom 10-275.

,.^;in;I · · ll x.r -- .*·r . · -, "i -rT-*-rrr-r,-~Y -YL iI~L--l

THE TECHI

Device Exterminates Mice Instantaneouslyg