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Experiments and observations on electricity
made at Philadelphia in America, by Benjamin Franklin, L.L.D. and F.R.S. To which are added, letters and papers on philosophical subjects. The Whole corrected, methodized, improved, and now first collected into one Volume, and illustrated with copper plates -
Observations on the expectations of lives
the increase of mankind, the influence of great towns on population, and particularly the state of London, with respect to healthfulness and number of inhabitants -
Lettres d'un fermier de Pensylvanie aux habitans de l'Amérique septentrionale