Louisa Charlotte Tyndall

Louisa Charlotte Tyndall (; 3 August 184519 August 1940) was the eldest daughter of Lord Claud Hamilton in England. Her uncle, the Duke of Abercorn, was the Lord Lieutenant of Ireland. She was born at Chester Square in London's Belgravia district, but otherwise little is known of her early life and education. She was the wife and assistant to the Irish physicist John Tyndall. John Tyndall was best known for experiments regarding scattering light by atmospheric particles and the absorption of infrared radiation by gases. She was a key component in John Tyndall's experiments and research and her greatest impacts lie in his work. After his death she compiled all of his records and research together, so there is a significant collection of his work.

Tyndall and John's Relationship Tyndall's mother, Lady Elizabeth Proby, was a member of the Royal Institution which allowed her to encounter John Tyndall. She assisted him with his work and writing his paper for the Royal Institution for some time before they made their relationship public. She outlived John by 47 years and throughout their time together, they had no children. After John's death, Tyndall refused to publish a biography of his work until all of his research was organized and finalized. It took Tyndall to die in 1940 for John's biography to be published in 1945. Louisa gave permission to A. S. Eve and C. H. Creasey to publish the biography before she died. She is the reason that there is a detailed record of John's life and work.