Encyclopaedia Britannica ...
Stewart, Dugald,1753-1828.
Whately, Richard.
Playfair, J. H. L.
Forbes, James David,1809-1868.
Traill, T. S.
Mackintosh, James,Sir,1765-1832.
Leslie, John,Sir.
Edinburgh : A. & C. Black,
1853-1860.
The dissertations are contained in the first volume.