John Tyndall

Who was Tyndall?

John Tyndall was an Irish physicist in the 19th century.

What did John Tyndall do?

John Tyndall helped germ theory become accepted.

How did John Tyndall help germ theory become accepted?

Tyndall helped germ theory become accepted in 2 main ways:

• ❖ He lectured on dust and disease by experimenting with light to show tiny microbes in the air.
• ❖ In 1876, he delivered a speech to British doctors on Koch's discoveries about anthrax.