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The Royal Society: Science in the Making

Correspondence Explorer

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Showing 4 letters from 1839–1840

4 letters from Henry Jr. Perigal; 0 letters from John Frederick William Herschel

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Sir John Herschel serves his first term as President of the Royal Astronomical Society

1839: to 1841

Birth of Maria Sophia Herschel, daughter of John Frederick William Herschel and Margaret Brodie Stewart

1839

William Henry Fox Talbot presents his paper-based photographic process at the Royal Society

1839

Autograph letter signed by sender. A note accompanying some machine-made mathematical curves.

Reference number: HS/13/364

Autograph letter signed by sender. More mathematical curves made by machine [see Henry Perigal's 1839-5-6].

Reference number: HS/13/365
1840

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. Invites John Frederick William Herschel to visit Henry Perigal to see the machine drawings being made [see Henry Perigal's 1839-8-17].

Reference number: HS/13/366

Autograph letter signed by sender. More on machine-made curves [see Henry Perigal's 1840-1-28].

Reference number: HS/13/367