BOSTON, MASS.--EXHIBITIONS.
 
_Mason, David, 1726-1794.
A course of experiments in that instructive and entertaining branch of natural philosophy, called elictricity [sic], to be accompanied with methodical lectures on the nature and properties of that wonderful element, by David Mason. The course to consist of two lectures. At a | pistereen each lecture.
CBoston, 1765]
broadside. 23.5x18cm.
Advertisements for Mason's course of experi-
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