History of coal mining in the United States - Wikipedia
1800s. At the start of the 19th century, coal mining was almost all bituminous coal.In 1810, 176,000 short tons of bituminous coal were mined in the US, versus 2,000 tons of anthracite.
Coal tar - Wikipedia
Coal tar is a thick dark liquid which is a by-product of the production of coke and coal gas from coal. It has both medical and industrial uses. As a medication it is used to treat psoriasis and seborrheic dermatitis (dandruff).