**Wesley Stoker Barker Woolhouse** (6 May 1809 – 1893) was an English actuary with diverse interests in music theory, the design of steam locomotives, measurements, and many other fields, publishing books in all these fields.

He was born in North Shields, England and at the age of thirteen won a mathematical prize offered by *The Ladies' Diary*, competing against adult competition.

From 1830 to 1837 he was Deputy Secretary of the Nautical Almanac. In 1844 he became editor of *The Lady's and Gentleman's Diary*, and continued in this role until 1865. A problem he published in *The Lady's and Gentleman's Diary* was the inspiration for Thomas Kirkman to publish his first mathematical work, on Kirkman's schoolgirl problem, beginning the mathematical study of combinatorial designs.

His book, *Essays on Musical Intervals, Harmonics, and the Temperament of the Musical Scale,* advocated 19-tone equal temperament and used a division of the octave into 730 parts, now designated as *Woolhouse units*, for measuring musical intervals.

He is credited with a formula for numerical integration.

In 1848 he was a co-founder of the Institute of Actuaries.

His daughter, **Emma Mary (Woolhouse) Rea,** married musician Dr. William Rea of Newcastle-upon-Tyne, England.

*An Elementary Treatise on the application of the Algebraic Analysis to Geometry* (1831)
*Essays on Musical Intervals, Harmonics, and the Temperament of the Musical Scale* (1835) (summarized on, reprinted as ISBN 978-1-4304-8126-3)
*Investigation of Mortality in the Indian Army,* (1839)
*Elements of the Differential Calculus* (1852)
*The Measures, Weights and Moneys of All Nations: and an Analysis of the Christian, Hebrew And Mahometan Calendars* (1856) (reprinted as ISBN 978-0-548-36669-1)
*On Interpolation, Summation, and the Adjustment of Numerical Tables,* (1865)