asgow mechanics' institute, and in 1831 he took the degree of M.D. at
the university of that city. Two years later he became professor of
chemistry in Marischal College, Aberdeen, but was obliged to give up the
duties of that position in 1844 through ill-health, though nominally he
remained professor till 1860. His name is chiefly known in connexion
with his process for softening hard waters, and his water tests,
patented in 1841. The last twenty years before his death at Glasgow on
the 27th of November 1867 were occupied with the study of the historical
origin of the Gospels.

CLARK, WILLIAM GEORGE (1821-1878), English classical and Shakespearian
scholar, was born at Barford Hall, Darlington, in March 1821. He was
educated at Sedbergh and Shrewsbury schools and Trinity College,
Cambridge, where he was elected fellow after a brilliant university
career. In 1857 he was appointed public orator. He travelled much during
the long vacations, visiting Spain, Greece, Italy and Poland. His
_Peloponnesus_ (1858) was an important contribution to the knowledge of
the country at that time. In 1853 Clark had taken orders, but left the
Church in 1870 after the passing of the Clerical Disabilities Act, of
which he was one of the promoters. He also resigned the public
oratorship in the same year, and in consequence of illness left
Cambridge in 1873. He died at York on the 6th of November 1878. He
bequeathed a sum of money to his old college for the foundation of a
lectureship in English literature. Although Clark was before all a
classical scholar, he published little in that branch of learning. A
contemplated edition of the works of Aristophanes, a task for which he
was singularly fitted, was never published. He visited Italy in 1868 for
the express purpose of examining the Ravenna and other MSS., and on his
return began the notes to the _Acharnians_, but they were left in too
incomplete a state to admit of publication in book form even after his
death (see _Journal of Philology_, viii., 1879). He established the
Cambridge _Journal of Philology_, and cooperated with B.H. Kennedy and
James Riddell in the production of the well-known _Sabrinae Corolla_.
The work by which he is best known is the Cambridge Shakespeare
(1863-1866), containing a collation of early editions and selected
emendations, edited by him at first with John Glover and afterwards with
W. Aldis Wright. _Gazpacho_ (1853)gives an account of his tour in Spain;
his v