Announcement of this achieve~ Atomic Energy project of the Medicine. It means that scientists studying growth and deterioration " 1111 may now acouiatoly lo- . ca ate ngle body cells which have absorbed a radioactive isotope. Thin achievement is expected to don the scope of radioactive tracer research in biology and . niedicine. Enabling scientists; to 111111“ Winorc about the processes "of the human body, radioactive traccis have been made plentiful velopment of atomic energy. Results of the experiment are ‘ published in a 1eport in “Science” George A. Boyd, staff ‘member he Atomic Energy project and I) Hilde Levi of Copenhagen, 1311111111111. The two scientists per- f not It was first discovered, in autor radiography, is in itself, a pack of photographic plates. When developed, the plutés showed a, blackened area which later moved to have been produced by radiation from the uranium. This blackened photographic plate Was , rst autoradiograph. Formerly, medical researchers were unable to pin down radio- active tracers to a single cell in a tissue section. They had no ~way of knowing exactly which cell contained the radioactive "material and was sending out electrons. Using the new tech- nidue, scientists may now deter— 'mine which individual @411 's producing electrons. Boyd and Dr. Levi used nuclear track photographic plates of se- lectcdlsensitivity to electrons from radioactive carbon.’ A microscopic slice from the liver of a rat which had been given radioactive carbon was placed directly on a photo— graphic plate. Electrons emitted from atoms in the liver cells bound- tracks of silver bromide grains. After the plate was developed in the usual manner, a pattern of black silver grains showed the tracks of electrons through the emulsion. By examining this pat- tern under a high-power micro- ! min. timetable llama appearing In Tech Timetable arc them which at me been scheduled with the Dean of Student! silica. FRIRAV, MARCH 17 English dega artment. 1 p. 111., NU and. beaglfsm Ka eckl atsch. 4.19m" Exec Chess club, 4 p. m., SU lounge MONDAY, MARCH 20 Placement, 9 am, NU and and Dean’ onf. roo BE club, 3 p.m.. 13 TFU, 4:3 Exec. cont 5m om Campus Flam ers. NU aunt, 5111.111 Delta Lamb :1 Xi, p..m NU oun‘ge Newmnen club, 55,111., MC con ., ,Rho oEpsllon, 5 p.m., 131MC C, 5 .m., IOSMC 11.151111, mnucn 21 Operations council, 9 a.m., Exec. BEm club. us Players, 110 p.111 au.d ,Fres man Health class, 1N pU m. 302M 1?“ ”S... 4%“ Fir-,8. 00 ac no 0 , m d 131MC gy p an WEENEfiDAV: MARCi-l 22 ,pfi Migdshlpmanm club, pfim ..,m NU! aXi, 8 p.m.,1 11‘5’611’ ounge 111112535111, MARCH: 23 ACS,1p ,IOBMC AIEE, lpp,81150 ICgénplus-m leayers, 1 p m. NU aud. Recordp concert 1 p 111.,131MC Mec cs semin ar, 4 121.111., 101MC . ,F‘izgefl‘l‘g‘ehnology club, 5 p 111., Exec. , A308, ‘1 p. 111., NU lounge colour, Mfihfitt dd ~5251-. su} Dela an‘s Kafieeglatsch, 4 Doing" 3.1271131: Marketfoom 1 b6 W “gm e u 4 M%m.. 2021/10 The first photograph of the tiack of an invisible beta particle speeding-$10111 a single body cell has been made by medical scientists. T to particle is n electron thrown out of a radio-active atom after being placed in a cell or tisSue section by artificial methods. ment was made by scientists at jl h eroity of Rochester School of” from which and inexpensive through» the de- , would not see as ”healtily invite them to attend our meetings ” Jaramillo, a native of a' pecimen of uranium sulfate on. cd into the emulsion and exposed- scope and tracing it back tot the tissue, it was possible to determine cells the electrons started. ‘ Biologists and medical scientists hope to use the new technique to learn the effects of organic “and inorganic substances on individual cells to which radioactive tiacers have been added. beholder students a blunt annual ion on nutivccustorna A novel series of informal talks on the customs, political situations, and folklore of foreign countries is being planned by the Foreign Stu- dents association. The discussions, which will be led by members of the association, will be open to all students, FSA President Jose 0. Jaramillo stated. “American students can get a picturoof other nations that they tourists. We Lima, Peru, said. Dates and places of meetings will be annmznced in Technology News and Newsletter. M By Paul Mandelotein John Gradle, EES: ’ “The minimum grade point av~ crage should be lowered to 1.8, be- causc‘l/G of the students on pro— bation is a pretty high percentage. Although, as has happened in past semesters, the number of stu~ dents on proba— tion will diminish until there is a proper equilib- r i u 111 between probationecrs, and non-probation- eers, a study of the grade point system might show a need to reduce even more the point aver— age neceasm-y to stay oil’ probation. I don’t think it will b u r t the school’s standing to any perceptible degree if it lowers the grade point , average requirements. It might be interesting to see if the number of ‘ students on probation will really drop as it has in the past, consider— ing that informer semesters there ., was an unfair non—cumulative grille point average system." William Baumgartner, MES: “At first thought the new four— , point system was supposed to help students. After seeing 500 students Fifid’l: . .and Finest. . .. at downer (Coat? Chevrolet is the only car that brings you these outstanding features at lowest prices . . . NEW WWW-STAR BONES n1“ ”SHEER ° NEW TWOJ‘QNE HSHER ENFERIORS '3 CENTERul’GlN’l‘ Slbiilllblfi 0 Milli/ED WlNDsl-ilELD with PANORAMW VlSlbll. [We lONGtib'l, HEM/HES? tO'Wu PRICED CAR 0 CERTI- SAFE HYDRAUHE RRAKER with Dubl- Lite. rive?- less linings 0 EXTRA-«ECONOMMAE. l0 GWN~©PERAW~MAlNlAlM RMWRMQ W auroral-inc idhtlshtlssmbl Combination of Powerglia’e Transmission and 10.5-11.1). engine optional on De Luxe models at extra cost. @Mhfi'fi‘lflbfi: "What is your reaction to the new arcade sysiem?" put on probation, I think this sys- tem is really too rough. I haven’t found anyonewho likes it and I’m sure the rest of the fellows on the track team will e c h o my views since we ‘1 lost some good men. The Ins tute would do well to lower the required average to 1.8, although anything lower than this would be objection- able. Some departments have fixed percentages of flunhs per class, and this presents a real contribution to the number on probation.” Robert Richter, CEB: “I really don’t have a cloar~cut opinion as to this new grade point system, because I have never had trouble with grades. I don’t think that this four-point system i s b a d e v c 11 though too many students are on probation. This number will ad- just itself in the coming semes- ters. Possibly one reason for numerous students being“ on pro- bation lies in the administrative policy of weeding out some stu- dents. MERR bl @anveuicnriy listed under “Automobiles”? 111 your local classified ieioyehone directory ~ E’s and a little easier for thou Tho Stylollne Do luxe 4~Door Sedan This car alone provides the trim and tailored beauty of Body by Fisher, at lowest cost! This car alone offers a choice of the finest in automatic or standard drives, at lowest cost! This car alone gives all the advantages of Valve—in—Head Engine performance—including the most powerful engine in its field—«at lowest cost! And so it goes through every phase of motor car value; for only Chevrolet odors so many features of: highest—priced auto» mobiles at the lowest prices! Come in and see the Chevrolet for ’50—«- first and finest at lowest cost/ a. John Chrystal, IE8: “This new grade point 5 makes it hard on those who have D’s This system is more fair, but I like the three-point system because, in general, it is 10 oi; as tough. Dropping grade 10 oi n ’0 require- ments is all right, but if entrance requirements were such the those capable of handling the were admitted, then a grad reduction would not be necess