Died: 7 March 1943 in Edinburgh, Scotland

Patrick Hardie's father was George Hardie (born Edinburgh about 1835) who was a hat manufacturer. His mother was Jane Hardie (born Culross, Perthshire (now in Fife) about 1837). Patrick Hardie had siblings: James (born about 1860), George (born about 1864), Jane (born about 1866), and Alexander (born about 1875).

Patrick Hardie's school education was at Newington School, Edinburgh, followed by George Heriot's School, Edinburgh. He then studied at the University of Edinburgh, first matriculating in 1890. Hardie studied Chemistry and Practical Chemistry with Crum Brown, Botany and Practical Botany with Balfour, Zoology and Practical Zoology, Mathematics with Chrystal, and Natural Philosophy with Tait.

He graduated with an M.A. with Honours in Mathematics and Natural Philosophy and the degree of B.Sc. in April 1898. On his way to this degree he passed the First B.Sc. Chemistry and Practical Chemistry examinations in April 1895, Botany and Zoology in July 1895, Second B.Sc. Higher Mathematics and Natural Philosophy in April 1898 having failed the examinations for these two courses a year earlier. He worked at Sharp's Institution, Perth in 1899-1900, The Academy, Rothesay in 1900-1901, and Hutcheson's Grammar School, Glasgow in 1901-02.

Hardie then went to Egypt where he worked as a Lecturer in Physics. He was at appointed by the Ministry of Public Instruction of Egypt to Ras-el-Tin Government School, Alexandria in 1904. Later, in 1913, he taught at Kedivial Training College, Cairo, and from 1922 in the Physics Department of the School of Medicine, Cairo.

Hardie joined the Edinburgh Mathematical Society in February 1900 while at Sharp's Institution in Perth, Scotland. He remained a member of the Society for the rest of his life. He joined the Royal Astronomical Society in 1903, giving his address as 305 Onslow Drive, Dennistoun, Glasgow. At this time he was teaching at Hutcheson's Grammar School. He was elected to the Royal Society of Edinburgh on 4 March 1918, his proposers being William Peddie, David Fowler Lowe, Cargill Gilston Knott, Charles Tweedie.

1. S Smith, Patrick Sinclair Hardie, M.A., B.Sc., Royal Society of Edinburgh Year Book 1944, 20.
2. Biographical Index of Staff and Alumni (University of Edinburgh).
3. Graduates in Arts, 1884-1925 (University of Edinburgh).
4. Graduates in Arts (University of Edinburgh).
5. Graduates in Science (University of Edinburgh).