Particulate organic carbon and nitrogen were collected from standard
  hydrocasts and filtered over low vacuum onto precombusted GF/F
  filters, and stored for subsequent analysis following JGOFS
  protocols. Samples were acidified, and represent organic
  carbon. Samples were
  analyzed at the Bermuda Biological Station for Research by BATS
  personnel using the BATS/JGOFS protocols.

  In general the deep water (> 1000 m) values for C and N are greater
  than in March. This was not expected. The data should be used with
  care pending further discussion.