20 Proceedings of the Royal Society 
Burgh Begistration Act,” and the other entitled, “ Outlines of the 
Procedure at Elections for Members of Parliament.” When Mr 
Cay was residing at Burntisland in August 1865, he accidentally 
fell, and received a severe fracture of the thigh-bone. His naturally 
robust constitution at first gave hopes of his recovery ; but these 
hopes were disappointed, and after much suffering, born with great 
Christian resignation and patience, he died in December 1865, in 
the 75th year of his age. 
John Archibald Campbell, Clerk to the Signet, and Sheriff- 
Clerk of Mid-Lothian, was born in the year 1788, and was the son 
of John Campbell, Esq. of The Citadel, Leith. In 1813, he was 
admitted into the Society of Writers to the Signet. From that 
year to 1816, he was joint Crown Agent ; and from 1843 to 1859, 
when he retired into private life, he was Sheriff-Clerk of Mid- 
Lothian. Mr Campbell was the founder or joint-founder of some 
of the most thriving institutions in Edinburgh, and he took an 
active part in those municipal changes in which the public were 
so deeply interested. 
Mr Campbell took a great interest in archmological researches. 
He was a Member of the Antiquarian Society, and of the Boyal 
Society of Arts, and he was elected a Fellow of this Society in 
1837. He died in Edinburgh on the 7th September 1866, in the 
78th year of his age. 
James Ivory, one of the Lords of Session, was born at Dundee 
on the 29th February 1792, and was the son of an engraver of 
great mechanical skill, and superior literary attainments. He was 
educated at the Dundee Academy, and acquired there a taste for 
mathematics, which he afterwards cultivated, and found an agree- 
able relaxation during the rest of his life. His devotion to mathe- 
matics was no doubt encouraged by his uncle, James Ivory, K.H., 
who was one of the most eminent of our Scottish mathematicians. 
Mr Ivory was educated at the University of Edinburgh, where he 
was distinguished by his literary as well as his mathematical 
acquirements. In 1816 he was called to the Scottish Bar, where he 
soon rose to great eminence in his profession. In 1830, Lord 
Jeffrey appointed him one of his depute-advocates, and in 1832 
