Percy Ludgate (August 2, 1883- October 16, 1922) was an accountant in Dublin and designer of an Analytical Engine. 1883 was a common year starting on Monday (see link for calendar). ... 1922 was a common year starting on Sunday (see link for calendar). ... Dublin (Irish: Baile Átha Cliath),is the capital and largest city of the Republic of Ireland, located near the midpoint of Irelands east coast, at the mouth of the River Liffey and at the centre of the Dublin region. ... The analytical engine, an important step in the history of computers, is the design of a mechanical modern general-purpose computer by the British professor of mathematics Charles Babbage. ...

Working alone, Ludgate designed an Analytical Engine while unaware of Charles Babbage's designs, although he later went on to write about Babbage's machine. The analytical engine, an important step in the history of computers, is the design of a mechanical modern general-purpose computer by the British professor of mathematics Charles Babbage. ... Charles Babbage Charles Babbage (December 26, 1791 – October 18, 1871) was an English mathematician, analytical philosopher and (proto-) computer scientist who originated the idea of a programmable computer. ...

His design featured several novelties, including a method of implementing multiplication referred to at the time as 'Irish Logarithms'. (Boys, 1904)

He died of pneumonia in 1922.

References

• Boys, C.V. "A New Analytical Engine", Nature, 81, 1909 14-15
• From Analytical Engine to Electronic Digital Computer: The Contributions of Ludgate, Torres, and Bush. Brian Randell, October 1982, Annals in the History of Computing, Vol. 4, No. 4
• Ludgate's Analytical Machine of 1909 Brian Randell, The Computer Journal, Volume 14, Issue 3, pp. 317-326. (This includes the Boys 1909 article in the Appendix.)