ARNOLD CONSTANTIN

See also:

• PETER
• PETER (Lat. Petrus from Gr. irfpos, a rock, Ital. Pietro, Piero, Pier, Fr. Pierre, Span. Pedro, Ger. Peter, Russ. Petr)
• PETER (PEDRO)
• PETER, EPISTLES OF
• PETER, ST

PETER

See also:

• FRANZ, ROBERT (1815-1892)

FRANZ VON

See also:

• ARNOLD CONSTANTIN PETER FRANZ VON LASAULX (1839—1886)

LASAULX (1839—1886)  , German mineralogist and petrographer, was born at Castellaun near Coblenz on the 14th of June 1839 . He was educated at Berlin, where he took his Ph . D. in 1868 . In 1875 he became professor of mineralogy at Breslau, and in 188o professor of mineralogy and geology at Bonn . He was distinguished for his researches on minerals and on crystallography, and he was one of the earlier workers on microscopic petrography . He described in 1878 the eruptive rocks of the district of Saar and Moselle . In 188o he edited Der Aetna from the MSS. of Dr W . Sartorius von Waltershausen, the results of observations made between the years 1834—1869 . He was author of Elemente der Petrographie (1875), Einfiihrung in die Gesteinslehre (1885), and Precis de petrographie (1887) . He died at Bonn on the 25th of January 1886 .