"their diverse combinations of colour and form, at times, as though microscopic magnifications from a biology textbook, and at others, as if some kind of geological precursor to the 50s experiments of Abstract Expressionism."
On the Disposition of Iron in Variegated Strata (1868) — The Public Domain Review
https://publicdomainreview.org/collection/on-the-disposition-of-iron-in-variegated-strata-1868/





