The carbon- 14 used through H031 consisted of freshly filtered 

 sub-samples of the stocks then in use, '^^he sub-saraple was carried to sea in a 

 conical flask and inoculation was made with a constant delivery pipec. This 

 was unsatisfactory and beginning in July 1955^ with cruise H032„ the carbcn-1^ 

 stocks were all laboratory-produced aliquots sealed in ampoules and sterilised. 

 Subsequently^ results became more consistent. The earlier reeults are con- 

 sidered as non-standard technique for this and other reason? concerned with 

 the development of the technique, such as variation in the oelicticn of incubators 

 and samplers used. Three later cruises, H037 - H039 , used bulk stock radioactive 

 solutions millipore- filtered a short time before use. rather than ampouled 

 stocks. Results from this series of cruises have been analyzed and published 

 (Doty & Oguri, 1956) insofar as they applied to the land mass effsct. 



Cruise code 



day 



month 



year 



H021 

 H022 

 H023 

 H024 

 H025 

 H026 

 H027 

 H028 

 HO 2 9 

 H030 

 H031 

 H032 

 H033 

 H034 

 H035 

 H036 

 H037 

 H038 

 H039 



1954 

 1954 

 1954 

 1954 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 

 1955 



597 



