Noun
gaseous mixture produced by distillation of bituminous coal and used for heating and lighting
Source: WordNetFree-flying ballooning using coal gas (which has about half the lifting power of hydrogen) became a popular sport. Source: Internet
At the same time, gas lights using natural gas or coal gas were coming into wide use. Source: Internet
In 1872 Paul Haenlein flew an airship with an internal combustion engine running on the coal gas used to inflate the envelope, the first use of such an engine to power an aircraft. Source: Internet
On page 248, Hennell mentions that Faraday gave him some sulfuric acid in which coal gas had dissolved and that he (Hennell) found that it contained "sulphovinic acid" (ethyl hydrogen sulfate). Source: Internet
Thus, in 1825 Faraday had unwittingly discovered that ethanol could be produced from ethylene (a component of coal gas) by acid-catalyzed hydration, a process similar to current industrial ethanol synthesis. Source: Internet