Edward Kater
John Frederick William Herschel
Sir John Herschel publishes in the Philosophical Transactions
1840: Sir John Herschel publishes “On the chemical action of the rays of the solar spectrum on preparations of silver and other substances, both metallic and non-metallic; and on some photographic processes”
Autograph letter signed by sender. Sending a paper, compiled from his late father's notes, for an escapement for an astronomical clock. Would be pleased if John Frederick William Herschel would communicate it to the Royal Society [of London]
17 March 1840 Sender: Edward Kater Reference number: HS/11/71