Illustrations
![](/images/18.78e635ab18c8aba21d3f83b/1703756262965/Eerste%20vervolg%20der%20proefneemingen.jpg)
Experimental traces of the electrical "calcination" of an alloy, Martinus van Marum. Eerste vervolg der proefneemingen... Haarlem, 1787.
![](/images/200.78e635ab18c8aba21d3fc68/1703760128245/Antikythera-mekanismen.jpg)
The Antikythera Mechanism. Schematic of the artefact's known mechanism. By Lead Holder [Public domain].
![](/images/18.78e635ab18c8aba21d3f899/1703756811414/salvia.jpg)
Georg Dionysius Ehret, 1708-1770, Salvia pratensis (1760s), watercolor on vellum. From Morgan Library & Museum, Drawings Online.