(1) In 1861 Crookes made the discovery which brought him the necessary eminence; he identified the new element thallium.

(2) The solution Crookes proposed was to create artificial fertilizer.

(3) The solution Crookes proposed is to create a chemical fertilizer.

(4) Crookes and Wallace ranged up on the opposing side, while Sir Oliver Lodge attempted to formulate a compromise that would jibe with his particular cosmic theories.

(5) Crookes came up a solution that to create a chemical fertilizer.

(6) RADIANT ENERGY: In 1875, Sir William Crookes discovered the properties of Radiant Matter.

(7) The tubes in which the rays were generated were known as Crookes tubes, which generated free electrons - then a topic of intense study - by applying a (DC) voltage of up to 100 kilovolts across a gap.