A Vital Wartime Metal - This looks like soap bubbles and that's just what it is. These bubbles raise tons of manganese ore daily by the "flotation" method, one of the steps in preparing the ore for the production of open hearth steel.

Digital Commonwealth — Boston Public Library

A Vital Wartime Metal - This looks like soap bubbles and that's just what it is. These bubbles raise tons of manganese ore daily by the "flotation" method, one of the steps in preparing the ore for the production of open hearth steel.

Wide World Photos, Inc. · [ca. March 1942]

RightsCC0 — Public Domain

CollectionDigital Commonwealth — Boston Public Library

[Information from item housing] Manganese--Manganese

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