Signedunsigned
Inscribedon base: 9 138 [?]
on base: 9 126 [?]
FunctionUsed for optical experiments and as a teaching tool for discovering the laws of optics.
Historical AttributesThis lens is most likely the one described in Joseph Mico's list of intruments sent from London in 1765 on board of the Devonshire. The entry reads as follow: "a large Convex Lens 7½ Diameter, Brass Semicercal handle & foot in Mahogany, very neat."
Published ReferencesDavid P. Wheatland, The Apparatus of Science at Harvard, 1765-1800 (Cambridge: Harvard University Press, 1968), 117.