In 1771 Thomas Jefferson described a " burning spring " in the Kanawha Valley, and when wells were drilled for salt brine near Charleston petroleum and natural gas were found here before there was any drilling for oil in Pennsylvania.
Jn 1841 natural gas was found with salt brine in a well on the Kanawha, and was used as a fuel to evaporate the salt water.
Brine wells have been mentioned above; the salt industry is still carried on in Mason county, and in 1908 145,157 bbls.
Though this industry has lapsed, there are brine baths, much used in cases of rheumatism, gout and general debility, and the former private mansion of Shrewbridge Hall is converted into a hotel with a spa.
The chief interest of the place centres in its brine springs which are largely impregnated with carbonic acid gas and oxide of iron, and are efficacious in chronic catarrh of the respiratory organs, in liver and stomach disorders and women's diseases.