Show Freaks and Oddities In Science News J 0 71 Zoologists studying the life lire of the sea are now calling chemists In Id to their aid Such studies have c lave become necessary because of ot discoveries of the great fluctuations even from day to day in the concentration concentration concentration con con- of necessary chemical elements In sea seawater seawater seawater water and also because of the new knowledge of the great importance of some elements clements like copper and manganese present In only the minutest amounts Oysters require rf a n trace of copper but no more than han a trace before they abandon the wandering habits of or their youth and settle down on the bottom to o grow fat and profitable for oystermen There is radically practically no copper in pure sea water but there is isa isa isi a i little in ill river water so that o oyster beds are almost invariably found near the mouths of rivers |