eating and getting back, TZ think we can have one more presentation before we go out. I think your presentation would lend itseif very well to a talk in the laboratory, Why don't you plan to describe this system during the tour and we will hear now from Mise Naomi Haliden on "Beta- Ab-= sorption Tec:niques"¢ MISS NAONI HALLDEN? In our analytical lsboretory we are called uron to analyze samples of a.lerge variety and bee cause of the magnitude of the isotopes that we are working with namely just in some case, a few disintegrationa per minute, Ve have to <A, Check the method by which we analyze these substances and also check samples te cake sure that if a sample hae been precipitated we are sure that that is the Lsotope we are talking about. This independent check has to be done with a certain amount of simplicity, We cannot take too much time per sample and we cannot have a tremendous amount of equipment to run each particular samrle, And so we