King Coal And The Heat Values Of Fuels

King Coal And The Heat Values Of Fuels A Potted History Of The Human Use Of Coal The term 'coal' covers many different materials with a common property: they are materials high in carbon which were formed from plant residues under pressure and over geologically long periods. BCE 13,000 - black amber, or jet, is known to have been used1 for ornamental purposes in Britain.BCE 2 - 3,000 - natural outcrop coal used for fuel in Britain.CE 200 - 400 - exploitation of surface coal fields on, by modern standards, a small scale.CE 1200 - 1300 - trade has developed in coal; mining is in development.CE 1600 - 1700 - experiments with steam engines, leading to read more

Read the whole article on

More from