WHA011228 - Oil wells at Oil Creek, 150 miles up the Allegheny River from Pittsburgh, Pennsylvania, USA. Engraving from Les Merveilles de la Science by Louis Figuier (Paris, c1870).
NOTE: Picture
quality on the Internet varies greatly. Different monitor settings
and browser software may display photos too dark or too light,
or with a colour cast. You may need to adjust the brightness & contrast
of your monitor.
