The author studies in what state the radioactive matter exists in the sea water and in the sediments. The material dealt with in the present experiments are partly from the 'Challenger' and partly from the 'Albatross' collections of Sir John Murray, F.R.S. It includes sediment samples and manganese nodules.From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.