Louisa Charlotte Tyndall (née Hamilton; 3 August 1845 – 19 August 1940) was the eldest daughter of Lord Claud Hamilton in England.[1] Her uncle, the Duke of Abercorn, was the Lord Lieutenant of Ireland.[2] She was born at Chester Square in London's Belgravia district, but otherwise little is known of her early life and education.[3] 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.[4] 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.