The Public Domain Review@publicdomainrev@mastodon.social
Beautiful illustrations of iron interacting with rocks, from the publication of a paper, "On the Disposition of Iron in Variegated Strata", delivered by the botanist and geologist George Maw to the Geological Society on April 22nd 1868: https://publicdomainreview.org/collection/on-the-disposition-of-iron-in-variegated-strata-1868?utm_content=buffer0b175&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer