FERGUSON, James. An Introduction to Electricity in six sections, London: W. Strahan and T. Cadell, 1775, 8°, second edition, 3 folding engraved plates at end (plates a little creased and also wormed at upper margin, heavy brown spots to upper and lower margin of title, marginal spotting and browning throughout, front free endpaper detached), contemporary calf (worn). [Sotheran 7849; Wheeler 429*a: "one of the best early treatises on electricity"]