version December 21, 1994 
  James J. McCarthy, Harvard Univ. 
  High Sensitivity Euphotic Zone Ammonium Data                      
  Thomas Thompson cruise TT007 
  
  Samples were obtained with the *trace metal-clean* rosette and    
  assayed by the method of Brzezinski (1988) Limnol. & Oceanog. 33: 
  1176-1182. Detection limit = 0.002 micro molar.