In his last years Tyndall often took chloral hydrate to treat his insomnia.
When bedridden and ailing, he died from an accidental overdose  of this drug in 1893 at the age of 73, and was buried at Haslemere.
The overdose was administered by his wife Louisa. “
My darling,” said Tyndall when he realized what had happened, “you have killed your John.”
 
Afterwards, Tyndall's wife took possession of his papers and assigned herself supervisor of an official biography of him.
She procrastinated on the project, however, and it was still unfinished when she died in 1940 aged 95.
The book eventually appeared in 1945, written by A. S. Eve and C. H. Creasey, whom Louisa Tyndall had authorised shortly before her death.

John Tyndall is commemorated by a memorial (the Tyndalldenkmal) erected at an elevation of 2,340 metres (7,680 ft) on the mountain slopes above the village of Belalp, where he had his holiday home, and in sight of the Aletsch Glacier, which he had studied.
In his last years Tyndall often took chloral hydrate to treat his insomnia. When bedridden and ailing, he died from an accidental overdose  of this drug in 1893 at the age of 73, and was buried at Haslemere. The overdose was administered by his wife Louisa. “My darling,” said Tyndall when he realized what had happened, “you have killed your John.”  
Afterwards, Tyndall's wife took possession of his papers and assigned herself supervisor of an official biography of him. She procrastinated on the project, however, and it was still unfinished when she died in 1940 aged 95. The book eventually appeared in 1945, written by A. S. Eve and C. H. Creasey, whom Louisa Tyndall had authorised shortly before her death.
John Tyndall is commemorated by a memorial (the Tyndalldenkmal) erected at an elevation of 2,340 metres (7,680 ft) on the mountain slopes above the village of Belalp, where he had his holiday home, and in sight of the Aletsch Glacier, which he had studied.
John Tyndall