PAGE TWO
UNIVERSITY DALI
ANSAN, LAWRENCE, KANSAS
TUESDAY, JANUARY 3, 1950
Little Man On Campus
By Bibler
"That'll take care of the writing—But what if he asks you to take an oral examination?"
Shock Waves Photographed By Means Of Razor Blade
Moffett Field, Calif.—(U.P.)—They are taking actual photographs of shock waves traveling through air in a $28,000,000 aeronautical laboratory here, and a two-cent razor blade makes it possible.
The scientific trickery is about the equivalent of taking pictures of a dog's bark, but it has great significance.
By photographing shock waves created by a model plane in a wind tunnel, scientists at the Ames Laboratory of the National Advisory Committee for Aeronautics are discovering the shape of the supersonic airplane of the future.
Each side of the wind tunnel test chamber is fitted with a circular window. The test model rests between the windows, with the air rushing past it.
The device that makes the process possible is known as the Schlieren apparatus, an optical arrangement that provides a picture of the shock waves by recording the distortion of light caused by the waves passing through the air.
On one side of the tunnel, a powerful high-pressure mercury vapor lamp about half the size of a cigar projects intense light onto a mirror.
This light is transformed into parallel rays by another mirror and sent through the windows of the test chamber. When it comes out the other side, a third mirror projects it into a viewing box and focuses the light on the edge of the razor blade.
Light that has not been distorted by the shock waves in the tunnel passes the edge of the blade, but
the rays which passed through the shock waves are deflected so they are cut off by the blade.
Beyond the blade is a screen, which, when photographed, shows the shock wave as a dark mass and the smooth air as a lighter area. The model shows as a black silhouette, with the shock waves around it.
It's really simple. The laboratory costs $28,000,000 and another $56,-000,000 is to be spent soon. The tunnels which utilize this technique cost about $5,000,000 apiece. The optical glass windows and the mirrors run up around $100,000 a set.
But Was The Cow Flying
Alamosa, Colo.—(U.P.) — The Alamosa Daily Courier, after printing an account about a hunter who shot a cow, thinking it was a deer, received the following letter from a reader:
"That cow has nothing on our Holstein cow that was mistaken for a pheasant and shot during open season on pheasants."
Mall subscription: $3 a semester, $4.50 a year, (in Lawrence add $1.00 a semester postage). Published in Lawrence, Kans., every afternoon during the University holidays and Saturdays and Sundays, University holiday hours. Entered as second class matter Sept. 17 1910, at the Post Office at Lawrence 1910, under act of March 3, 1879.
University Daily Kansan
Glad To See You're Back
All campus parking regulations are again in force starting at 8 a.m. Tuesday, January 3, 1950.
A. S.T.E. members wishing transportation to Kansas City meeting tomorrow, leave name in Fowler Shops office.
Delta Sigma Pi business meeting, 7:30 p.m. Thursday, Pine room, Union.
January 3.1950
Hank Brown's Camera Shop
Official Bulletin
Graduate students coffee hour, 7 p.m. Thursday, Henley house. All graduate students are invited.
"Explorations in Yucatan and Quintana Roo", lecture with color film by Dr. Robert T. Hatt, sponsored by Snow Zoology club, 7:30 p.m., Thursday, Strong auditorium. Public invited; free admission.
Sociology club, 4 p.m. Thursday.
Strong auditorium. Dr. Ernest Manheim,
University of Kansas City,
"The Sociologist and Politics."
Everyone welcome.
Wesley Members Serenade
"If we sell it we stand behind it"
Wesley Foundation members serenaded the aged and sick of the Methodist parish with carols Monday evening.
846 Mass.
Refreshments were served the carolers at the Methodist church following the serenade.
New & Used Parts for All Cars
- Auto Glass
  * Mirrors
    * Glass Table Tops
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Phone 954 712 E. 9th
Watch Bands for those new Christmas Watches Speidel - Bretton - Gemex $5.95 Fed. tax included
Samples Watch Shop
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