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Distributed for University of Wales Press

Joseph Harris

Scientist, Artisan, Assay Master

A detailed view into the Welsh polymath who revolutionized navigation, astronomy, and economic policy.

While Joseph Harris may not be a household name, his contributions to science and public policy left a lasting impact on Britain and beyond. A protégé of Edmond Halley and a skilled artisan in mapmaking, Harris played a crucial role in advancing astronomy and navigation. His work influenced some of the most prominent scientists of his time, and as assay master at the Royal Mint, he helped standardize weights and measures, which shaped Britain’s economic policies in ways still felt today.

This profile restores Harris to his rightful place in history, revealing his role as both a scientist and a dedicated public servant. From recording the 1761 Transit of Venus to advising prime ministers on monetary policy, his life exemplifies the intersection of craftsmanship and governance. A tribute to one of Wales’s unsung intellectuals, Joseph Harris: Scientist, Artisan, Assay Master redirects our focus on the individuals who quietly shaped the modern world.

176 pages | 23 halftones | 5.43 x 8.5 | © 2025

Scientists of Wales

Biography and Letters

History of Science


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Table of Contents

Introduction
Chapter One Joseph’s early life
Chapter Two London and Apprenticeship
Chapter Three Caribbean Voyages
Chapter Four Navigation, Cartography and Mathematics
Chapter Five Assay Master at the Mint
Chapter Six Joseph and his Family Relationships
Chapter 7 The Carysfort Commission
Chapter Eight The Transit of Venus
Chapter Nine Economics and Essay on Money and Coins
Chapter Ten Joseph’s Final Scientific Treatise
Chapter Eleven Joseph and his Heirs
Bibliography
Endpiece A Timeline of Joseph Harris
Index

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