The author analysed a collection of 91 tub-specimens, taken during the two voyages of the Ingolf-expedition in the summers of 1895 and 1896.

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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.

Supplement to: Boeggild, O B (1900): The deposits of the sea-bottom. In: The Danish Ingolf-Expedition. Københavns universitet. Zoologisk museum, Coppenhagen, Denmark, https://archive.org/details/danishingolfex1pt1a2daniuoft and https://ia802605.us.archive.org/34/items/danishingolfex1pt1a2daniuoft/danishingolfex1pt1a2daniuoft.pdf for station details, 89 pp