De Brimont, Un Pape au moyen age - Urbain II.
De Boisbaudran, Urbain and Lacombe (Comptes rendus, 1903, 1 37 pp. 568, 792); Demargay (ibid.
Urbain and H.
Paulot's Un Pape francais: Urbain II.
- Magnan, Urbain V.
Albanes, Actes anciens concernant le bienheureux Urbain V.
URBAIN JEAN JOSEPH LEVERRIER (1811-1877), French astronomer, was born at St Lb in Normandy on the II th of March 1811.
On the 27th of June 1878 he succeeded Urbain Leverrier as director of the National Observatory of Paris, and was raised to the rank of rear-admiral.
Urbain separated ytterbium into two new elements, neo-ytterbium and lutecium (atomic weight, 174.0); and in 1908 C. A.