Experiments and observations on electricity : made at Philadelphia in America (1751)
Franklin, Benjamin, 1706-1790, Collinson, Peter, 1694-1768, Jefferys, Thomas, d. 1771, engraver, DeMarsh, Eric E., former owner. DSI, Burndy Library, donor. DSI · London : Printed and sold by E. Cave, at St. John's Gate · leaf 86
^^f^^*y^ ooujt,. … Letters on Electricity. 73 Furnace, has no more of this eledtrical fluid than othercommon matter : That when it is blown, as it cools, andthe particles of common fire leave it, its pores become a va-cuum : That the component parts of glafs are extremelyfmall and fine, I guefs from its never fhowing…
Electricity
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