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A 1928 photogravure of a <n>Cobaea scandens</n> plant by artist <n>Karl Blossfeldt</n>.

A 1928 photogravure by <n>Karl Blossfeldt</n> of <n>Polypodium vulgare</n> and <n>Ribes sanguineum</n>.

Illustration by <n>René Henri Digeon</n> and <n>J. Silberman</n> from <n>Amédée Guillemin</n>'s <n>Le Monde Physique</n> (1882).

<n>'Calx carbonata' [Ammonite with crystals]</n>, an 1803 illustration by <n>James Sowerby</n>.

<n>Harmonograph pattern</n>, a salted paper print by artist <n>Benjamin Creswick</n>, c. 1890.

An albumen silver print by <n>Edward J. Woolsey</n> from his 1869 book <n>Specimens of Fancy Turning</n>.

<n>Plate XVII</n> from <n>Thomas Wright</n>'s 1750 book <n>An Original Theory or New Hypothesis of the Universe</n>.

An illustration by <n>Edward J. Woolsey</n> from his 1869 book, <n>Specimens of Fancy Turning</n>.

<n>Globeflower</n>, a photograph by <n>Karl Blossfeldt</n> from his 1928 book <n>Urformen der Kunst</n>.