ding gradually depositing a basic salt.
Double sulphates of composition 2Ce(SO4)2.2K2SO4.2H2O,
Ce(SO4)2.3(NH4)2SO4.4H2O are known. Nitrates of cerium have been
described, as have also phosphates, carbonates and a carbide.

Cerium compounds may be recognized by the red precipitate of ceric
hydroxide, which is formed when sodium hypochlorite is added to a
colourless cerous salt. For the quantitative determination of the
metal, the salts are precipitated by caustic potash, the precipitate
washed, dried and heated, and finally weighed as the dioxide.

The atomic weight of cerium has been determined by B. Brauner (_Chem.
News_, 1895, lxxi. 283) from the analysis of the oxalate; the values
obtained varying from 140.07 to 140.35.

CERNUSCHI, HENRI (1821-1896), Italian politician and economist, was born
of wealthy parents at Milan in 1821, and was destined for the legal
profession. During his studies he became involved in the revolutionary
movement. He played a conspicuous part in the insurrection at Milan in
1848, and also at Rome in 1849, where he had a seat in the National
Assembly. On the collapse of the revolutionary government he was
arrested (1850), but managed to escape to France, where he engaged in
commerce and banking, became naturalized, and acquired a large fortune.
He took a prominent part in opposing the Socialist movement, and in
April 1870, having subscribed a large sum to the funds of a committee
formed to combat the Napoleonic plebiscite, had to leave the country. In
September the formation of the Third Republic enabled him to return, but
he soon left Paris to travel in the East, whence he returned with a fine
art collection, particularly of Japanese objects. Cernuschi is best
known for his publications on financial questions, more especially
bimetallism. Of the latter he was an ardent champion, and the word
itself is commonly supposed to have originated with him--at least in its
English form it is first found in his _Silver Vindicated_ (1876). Among
his other works may be mentioned: _Mecanique de l'echange_ (1861);
_Illusion des societes cooperatives_ (1886); _Le Bimetallisme en
Angleterre_ (1879); _Le Grand Proces de l'Union latine_ (1884). He died
at Mentone on the 12th of May 1896.

CEROGRAPHY (from the Gr. [Greek: keros], wax, and [Greek: graphein], to
write), the art of painting in wax. (See ENCAUSTIC PAINTING.)

CERRO DE PASCO, or PASCO, a mining town of Peru