Black metal (iron) U-shaped base with cylindrical brass (plated) parts; two metal slide clips mounted to slide plate; rotatable eye piece lowered or raised by the adjustment of top right knob; circular mirror underneath…

A painting in brunaille, a monochromatic image in tones of brown. This painting shows a seated alchemist in peasant garb. In his hands he holds a crucible and a pair of tongs, working before the light of a glowing fire…

A chromolithograph published in Vanity Fair of Marie and Pierre Curie and their apparatus for isolating radium chloride.

An alchemist wearing a green robe uses a pair of bellows to control the heat of the fire beneath his crucible. Other vessels sit on the furnace at his side, and to his left a large still-head for distillation rests over…

A lithograph portrait of a young Michael Faraday, looking left with his hand on his hip.

A seated portrait of William Hyde Wollaston (1766–1828), English chemist and physicist. He is holding spectacles and a piece of paper.

A half-length portrait of French scientist Joseph Louis Gay-Lussac (1778–1850).

A portrait of a seated Matthew Boulton (1728–1809), a British industrialist and entrepreneur. He is seated in front of a window, holding a magnifying glass and a coin. In the background is a large building.

A portrait of a man (possibly Athalante Legrand, a French mathematician) in academic dress seated with his right arm on a ledge, pointing to a geometric diagram.

Mezzotint of a portrait bust of the Irish chemist Robert Boyle (1627–1691) in an arched niche.

A half-length seated portrait of Martin Folkes (1690–1754), English mathematician and president of the Royal Society.

A half-length seated portrait of the 17th-century doctor Gerardus Blasius pointing to an anatomy figure in a book.

A bust-length portrait facing left in profile of Professor Joseph Black (1728–1799) in an octagonal format.

A framed portrait of Joseph Black (1728–1799), professor of chemistry at University of Glasgow, seated and holding a document.

An oval bust-length portrait of Eilhard Mitscherlich (1794–1863) facing right. He was a German chemist known for his law of isomorphism.

A three-quarter-length portrait of Thomas Graham (1805–1869), the Scottish chemist who worked on the diffusion of gases.

An oval bust-length portrait of D. Alexander Nicolaus Scherer.

A Chine-collé portrait of English naturalist Charles Darwin (1809–1882) sitting in a wicker chair near a hanging tapestry.

A half-length portrait of Friedrich Wöhler (1800–1882), a German chemist.

An oval bust-length portrait of Francis Lord Bacon (1561–1626), the English philosopher, lawyer, statesman, author, and scientist. Beneath is a rectangular image of a man seated on the left and standing figures on the…

A mid-length portrait of Robert Hare, MD.

An oval bust-length portrait of the German chemist, physicist, and biologist Franz Karl Achard (1753–1821).