Sir William Crookes

Personal Life• Born on June 17, 1832 in London

• Enrolled at the Royal College of Chemistry at the age of 15!• He became superintendent of the meteorological department at the

Radcliffe Observatory in Oxford in 1854• Appointed lecturer in chemistry at the Chester training college in

1855• He was knighted in 1897, and in 1910 received the order of merit

Experiments and Contributions

• He discovered the metal Thallium in 1861 through the use of spectrum analysis

• In 1873, he determined the atomic weight of the new element in a research which is still a model of analytical precision

• He was also identified the first know sample of Helium• He was the inventor of the Crookes Radiometer, which today is

made and sold as a novelty item • He also developed the Crookes Tubes, investigating canal rays• He invented one of the first instruments for the study of nuclear

radioactivity • He was a pioneer in the construction and use of vacuum tubes for

the study of physical phenomena.

What Impact does some of these do?

Inventions and Discoveries

Crookes Tube

Nothing

Thallium

• Used in treatment of skin infections

• Used as a dopant for sodium iodide crystals in gamma radiation detection equipment

• Radioactive thallium 201 is used for diagnostic purposes, particularly in stratification in patients with coronary artery disease

Need I say more

• Crookes Radiometer AKA a lightmill

Neat little thing

Awards and Recognitions

• Knighted in 1897

• Received Order of merit in 1910

• various times he was president of the Chemical Society, the Institution of Electrical Engineers, the Society of Chemical Industry, the British Association, and, from 1913 to 1915, of the Royal Society

William in a few pictures

In loving memory of William Crooke

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