Indianapolis Times, Volume 40, Number 12, Indianapolis, Marion County, 25 May 1928 — Page 22

PAGE 22

STEEL PHOTOS PRODUCED WITH AID OF SLAST Nitro-Gelatin Explosive Is Used to Get Imprint on Metal, tii Science Scrvicr WASHINGTON. May 25.—Shooting a photograph into the hardest of chrome steel with the aid of high explosive nitro-gelatin, and so making a photographic record as permanent as the steel itself, is the feat that has been accomplished as a result of the "Munroe effect.” This effect was the discovery of Dr. Charles E. Munroe, veteran explosives expert of the United States Bureau of Mines here. An incidental result of the work is the proof that the black in a photographic print are due to varying thicknesses of finely divided silver, the thicker the deposit, the darker being the shadow in the photograph. The steel photograph was made recently by G. St. J. Perrott, superintendent of the Bureau of Mines experiment station at Pittsburgh, and sent by him to Dr. Munroe. To make it, a. photograph of Dr. Munroe was laud on a piece of steel about two inches in diameter and an inch thick. On top of this was placed a disc-shaped piece of the nitro-gelatin explosive, which was . then fired. Paper Photo Lost Though the photograph was completely destroyed, when the steel coojed sufficiently to be handled, the profile of Dr. Munrvoe was found impressed on the surface. Where the photograph had been black, that is, in the shadows, the surface of the steel was raised, and where there had been high lights, the steel was incised. Another example of the effect that is in Dr. Munroe's possession now was made by W. O. Snelling, director of research of the Trojan Powder Company. In this case the •words “Munroe Effect” were impressed into the surface of a block of the explosive, so that the letters were intaglio. When this was exploded on a disc of the steel the letters appeared on it. However, they were also in intaglio on the steel. This is' the opposite from what would be obtained with a die. ;for then the intaglio letters on the die would come fut in relief on the finished product. Solid Becomes Gas Dr. Munroe explains the effect by saying that when the detonation of the explosive occurs, the entire amount of the solid is converted to gas. This volume of gas, however, momentarily has the same size and shape as the original block of the explosive, and is therefore extremely compressed. Where there was a cavity in the original e xplosive is the line of least resistance for the escape of the rapidly moving gas molecules. In seeking to escape, they collide with each other, producing a vast number of tiny molecular drills, which bore into the hardest steel.

t zb vo o/n at your I Wl Shoes ' E j*S£r "“To succeed in any walk of ' := 1 life, neat -looking shoes ' help make the good imIpression you must give! Be "polished’-—spend 2 PPitet, C minutes a day with ShimhA RTYrVc JET-OIL-15c 1 [LIQUID POLISH] The Home Shoe Polishes A Vv All colors —at all dealers jAr

| THE ORIGINAL I M Payments as Low as SI.OO Per Week THE UNION TIRE CO. GEO. MEDLAM, Pres. Open Till 8:00 P. M. / Main 6273 Cor. S. Illinois A Georgia Sts.

Win Africa Trip

1 ll -=Amir

Os the 820,000 Boy Scouts in the United States, the three 15-year-olds pictured above have been selected by national scout executives to accompany Mr. and Mrs. Martin Johnson on a camera safari through the big game country of Africa this summer. From top to bottom they are: Eagle Scout Robert Dick Douglas. Jr., of Green?boro, N. C., Eagle Scout Douglas Oliver, Atlanta, Qa.; Eagle Scout David R. Martin,'Jr., Austin, Minn. They are to sail June 9 and will be met at Nairobi by Martin Johnson. \ COURTS LADY LUCK Clerk May Win $625,000 On Race Lottery Bn United Press LONDON, May 25—An insurance clerk, Henry FJexman. today dreamed of great wealth. Recently ! he drew the name of Hfee Epsom Downs derby favorite, fairway, in : the Stock Exchange Sweepstake, j Should Fairway win, Flexman would j win about $625,000. Syndicates were j said to be negotiating to purchase ! half of Flexman’s ticket.

HEALTH DAY OFFICIAL Congress Adopts Resolution to Make Observance National. By Science Service WASHINGTON, May 25.—The

FRIDAY and SATURDAY RACE DAY Cl A I 17 f RADIO J/ALjiCj# Hear the whir of the motors! The clamor of the crowds! Get that thrill of the Races in your own home! KOLSTER)®

Regular Price $89.50, Less Accessories AN AMAZING OFFER! A WONDERFUL BARGAIN This 6-tube Kolster Radio in a golden-toned walnut cabinet with panel to match—single tuning control—calibrated in meters and wave lengths—adjustable for both sensitivity and selectivity. A real set at an unheard-of price of $39.50. Only a few at this price. Come early 1 KOLSTER 6D JQ/| .50 1 [KOLSTER 6D $1 OK I>. C. opcrnlf*! Complete. ■■■ A* C. operated. Complete 8 Term* H ~ Easy Tri m* I MJEH HATFIELD ELECTRIC CO. MA in 0123 MERIDIAN AT MARYLAND MA in 0123

Saturday Specials . /ley ’■"■etJ KALTEX jgllilM SWINGS Tlie furniture with “the heart of steel.” Complete with chains and hooks. Hung on your porch FREE OF CHARGE. Swing $22 6 -Ft. Swing $26 7* Ft * Swin 8 S3O

New RUGS Specially Priced SEAMLESS AXMINSTERS, extra heavy quality. Beautiful new patterns. New colorings. 9x12 ft. Special s4^T 50 SEAMLESS FRINGED VELVET RUGS. All wool. Patterns for all rooms. Very special—*29*

Best Print Linoleum New Acolac finish in beautiful patterns and colors. Slight misprints of best quality which do NOT impair wearing qualities. Square yard 89*

Arabesq, Acolac Finish Very, colorful, in the wanted new Acolac finish. Most unusual patterns and colors. Square yard sl-25

PORCELAIN TOP Kitchen Tables Sturdy, hardwood legs, well constructed. White enamel with large drawer. ™ ' Size 24x36 inches.

‘power-fester's Trade in Your Old Furniture on New—Convenient Monthly Terms 37 to 41 South Meridian St. “The Center of Furniture Row” *

THE INDIANAPOLIS TIMES

observation of Child'Health day on the first of every May has become a national institution through the passage of a resolution by Congress. Originally Introduced by the American Federation of Labor, it i was supported before the House

fjjTo, ; py % Klun-koio M

Kleen'Kold Jiefri^erator fits your home and purse

CORK INSULATED Cork, the perfect insulation for keeping cold in and heat out, sealed for added protection, between heavy layers of asphalt sheathing.

1

SANITARY Seamless porcelain or enamel linings with easily accessible, rounded comers, enable you to keep kleen-kold clean and sweet without effort. Copper drain and racks removable for thorough cleaning.

ECONOMICAL Perfect insulation, snug-fitting doors and provision for proper circulation conserve ice and prevent undue food waste through spoilage.

EFFICIENT kleen-kold keeps food fresh and sweet by the circulation of properly conditioned, chilled air through ample food chambers. The kleenkold way is Nature’s way,—and it’s Noiseless.

committee on education by John J. Tigert, United State commissioner of education; Jay Elmer Morgan of the National Education Association, and Frank W. Ballou, superintendent of schools of the District of Columbia.

a

mm ralll

Tube Given With Tire PA Y AS YOU RIDE Don’t let tire troubles spoil your holiday outing. We have tires to suit all pocketbooks and you can pay later. Our Policy: Every Customer Must Be Satisfied

Long-Life Kokomo Bristol Cords and Balloons All First Quality, Fresh Stock and Fully Guaranteed—Easy Terms — Tube Given

30x3!4 97.25 30x3)4 O. S. ... 8.90 i 30x314 S. S. ... 9.90 31x4 S. S 12.90 | 32x4 S. S. ...13.90 33x4 S. S 14.90 | Terms to Suit 1

FEDERAL TIRES PAY AS YOU RIDE All First Quality Note Our Low Prices

30x3'4 $7.90 30x3if. O. S. ... 9.50 31x4 S. S. ...13.90 32x4 S. S. ...14.90 33x4 S. 5... .15.90

Defenders No Extra Charge for a Charge Account

INDIANA WHOLESALE TIRE CO. 825 N. Capitol Riley 6677 Out of the Congested District Plenty of Private Parking Space Free Mounting Service Open Sunday Open Evening t

“Walk Up a Flight and Save the Difference” RUBENS VALUES The Greatest Sensation in The History of Our Forty Years In Business! And Here’s the Reason Why Our low, upstairs rent, extremely low operating expenses, selling only for cash, with a very low margin of profit, enables us to offer these wonderful values in men’s and young men’s “Broadway CIIITC Tailored” and 111 I 0 AT OUR SPECIAL PRICE

“Walk Up a Flight arid Save the Difference”

£ to £ to •JS ito ft> e to $ Cr. k e ft. k ’e

“Walk Up a Flight and Save the Difference”

Light colors, dark colors, young men’s models, including the popular double-breasted vest suits. Conservative models. Every suit splendidly built and elegantly trimmed. 4 YOU’LL FIND IT PAYS TO BUY AT RUBENS 40 WEST WASH. ST., UPSTAIRS r ENTIRE SECOND FLOOR THOMPSON BUILDING PIONEER UPSTAIRS CLOTHING STORE IN INDIANAPOLIS OPEN SATURDAY NIGHTS TILL NINE

28x4.40 89-60 30x4.50 10.60 30x5.00 13.50 31x5.00 13.90 30x5.25 15.50 31x5.25 15.90 32x6.00 17.90 33x6.00 18.00

] 29x4.40 89.90 30x5.00 12.95 I 31x5.00 14.60 32x6.00 18.50 33x6.00 .19.20

TIGER FOOT TIRES We are distributors of the famous Tiger Foot Tires, famous for long mileage. Sold on Our Easy Payment Plan Tiger Foots carry a year guarantee. We have made thousands of friends and boosters with Tiger Foot Tires, and we know you, too, will be satisfied. They are priced surprisingly low.

HOOSIER HI-POWER BATTERIES They Will Give You Safe and Sure Ignition. Guaranteed a Year.

6-11 $8.90 6-13 $10.90 12-7 $12.50 Exchange

MAY 25, 1928

EASY TERMS Built With Heavy Plates to Insure Long Life.

a r*< a fta s ft. ¥ cti <v to c*