About John Southern
Lived 1758 – 1815 (aged 56–57). John Southern was an engineer.
John Southern ( 1758–1815) was an English engineer, son of Thomas Southern of Derbyshire. In 1796 he and his employer James Watt co-invented the Indicator, an instrument for measuring and recording the pressure inside a steam engine cylinder through its stroke. This data was crucial for assessing an engine's efficiency. Southern became a partner of the firm of Boulton and Watt in 1810.
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Important facts
People in John Southern's life
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Contemporaries
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Frequently asked questions
Who was John Southern?
English engineer
When was John Southern born?
John Southern was born in 1758.
When did John Southern die?
John Southern died in 1815.
What was John Southern's occupation?
John Southern was an engineer.
Sources & further reading
· DBpedia: John Southern (engineer)
Cite this page
APA: Biography.guide. (2026). John Southern. https://biography.guide/john-southern/
MLA: "John Southern." Biography.guide, https://biography.guide/john-southern/.
Chicago: "John Southern." Biography.guide. https://biography.guide/john-southern/.
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