Observations on the storm of December 15, 1839
A scientific paper on meteorology by William C. Redfield, printed in Philadelphia in 1843 and addressed to fellow natural philosophers and storm researchers, analysing the great storm of December 1839 along the Atlantic seaboard. The single picture is a folding-style chart of New England and the Atlantic states with concentric curved lines marking the direction of the wind at successive places on the storm's track. A designer could take from it the clean, hand-engraved isobar linework and the way fine concentric rings and rhumb arrows layer over a plain state-boundary map.
