BROADSIDES.
RARE Boor, ' Drey, { _Mason, David, 1726-1794. ' XbH A course of experiments in that instructive ) -90b and entertaining branch of natural philosophy, 203 called elictricity Csic], 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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