Mr Söderblad from Sarna (uppermost parish in the East-Dalarna) provided the Swedish School of Mines with several specimen of bog ore (myrmalm, in swedish) and a fresh slag. From these 4 analyses have been performed.

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1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions.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: Nordström, H A (1828): Berättelser rörande göromälen vid Bergs-Skolan år 1837 = An account of the activities of the Swedish School of Mines in year 1827. Annals of Steel Research, Stockholm (Jern-kontorets annaler), 12, 123-143