Colours, Lucretius' explanation of differences between, [ 18.]
Combustion, [ 141.]
Compounds, chemical conception of, [ 171.]
Conservation of mass, [ 164.]
Curie, her discovery of radium, [ 182.]
Dalton's additions to the Greek atomic theory, [ 21,] [ 172.]
Democritus, his saying about atoms, [ 15.]
Dephlogisticated air, [ 147.]
Destruction, thought by alchemists to precede restoration, [ 65,] [ 127.]
Electrons, [187-189,] [ 197,] [ 198.]