[39] Breve cenno sopra la richezza mineralogica della Toscano, Pisa.
[40] Sulla vera posizione del terreno di macigno in Italia, Pisa; and Memoires de la Société geologique de France, 2me serie, t. ii.
[41] Storia del tremuoto che ha devastuto i paesi della costa Toscana, il di 14 Agosto 1846, Pisa.
[42] Miscellanee di fisica e di Storia naturale di Pisa, anno 1, Nos. 7 and 8.
[43] Trattato di geologia, t. i., Pisa, 1847.
On the Chronological Exposition of the Periods of Vegetation, and the different Floras which have succeeded each other on the Earth's Surface.
According to the views of M. Brongniart.
(Continued from p. 330 of Volume 48.)
“II. Permian Period.—The nature of the vegetables which appear peculiar to this epoch, is far from being determined in a positive manner; for the few localities where the fossils we consider as belonging to it, have hitherto been found, are not perhaps really of a formation very identical and truly contemporaneous. For it may be asked, whether the bituminous and copper slates of the county of Mansfield, classed by all geologists with the zechstein, and the sandstone of Russia, placed by M. M. Murchison and Verneuil in their Permian formation, are really contemporaneous? Finally, is there greater reason for classifying the slates of Lodève, considered by M. M. Dufresnoy and Elie de Beaumont as depending on the variegated sandstone, but so different from the same sandstone of the Vosges in its flora, in this period, which would thus be a kind of passage from the coal period, so well characterised, to the vosgian or variegated sandstone, which differs from it in so decided a manner?”