Phlogiston, [ 126,] [ 130,] [ 137.]
Priestley, his discovery of oxygen, [ 144.]
Principles, the alchemical, [ 49,] [ 51,] [ 54,] [ 60,] [ 133.]
—— Lavoisier's use of the word, [ 163,] note.
Radio-active substances, are they elements? [ 191,] [ 194,] [ 195;]
properties of, [185-187.]
Radio-activity, characteristics of, [ 183,] [ 184;]
of radium, [ 186;]
of thorium, [ 193;]
of uranium, [ 193.]
Radium, emanation of, [ 187;]
heat from, [ 186;]
rays from, [ 186.]
Ramsay, on transmutation of elements, [ 199.]
Regimens, the alchemical, [ 72.]
Sacred art, the, [ 122.]