the plant iteelf, the relationship is exponential snd inveress Now, with regard te the water situation the studies wich] are under way are really just prelininary, You've heard sane about the work being done in Massachusetta, that is being] suppe lexented by a study of the reservoir at froy, New York. [n the past rather sketchy studies of Lake Head have been condached (not adequate, I think) and a mmber of streans have bees involved in studies over a maber of years particularly a Oak ifdse and of course the project at Hanferd has been ve much interosted in the modification of the Columbia River founs, We have likewise anticipated these things at the Savannah River area and a general surwy of the biolo¢! balance there has just been aampleted to give a line for future coxtearisons, Sow continuing in the water ares, ong is comerned very mach with the factor which have been msnticned The fact that so many of the food cycles which are to men have their origin in the scte there scain we become concemed with the tectopes of long half life which| alee nay be ploked up particularly exphatiesily by the plmkton We find thet strontion aain becuse ixportant because the tebd~ cacy to acncentrate 1s perhaps more marked in thestroatiz calcium coa-lex than it fs with respoct to any other of th radioactive isotopes of al mificant half-Fife, ‘This ig no linited to the plankton, bat ons finds the sane thing secu in various forms of life, for exmple, the maquite larva itself, even though the water itself may not be high ia stzon tiua if the godiment in a case of a botter burrowing larva test fae Ma a wn tin itt ent up ty the nosquite larva is quite surprisingly highs Such