Experiments and Observations On Electricity, Made At Philidelphia in America, To which are added, Letters and Papers On Philiosphical Subjects. The Whole corrected, methodized, improved, and now first collected into one Volume And Illustrated with Copper Plates

Endpaper detached with stamp of previous owner in purple ink. Pen signature of ? "Johnstone, Edinburgh" on half title page. Page numbers 112-113, 416-417 and 465-472 appear twice, advertisement and errata leaf bound between title page and preface, index appears after numbered pages.
Overall a clean copy in a worn contemporary binding. The most desirable edition of the publication described as the "most important scientific book of eighteenth-century America" in Printing and the Mind of Man. (Inventory #: OSLAS1)