Footnote 40: Sulla vera posizione del terreno di macigno in Italia, Pisa; and Memoires de la Société geologique de France, 2me serie, t. ii. Footnote 41: Storia del tremuoto che ha devastuto i paesi della costa Toscana, il di 14 Agosto 1846, Pisa. Footnote 42: Miscellanee di fisica e di Storia naturale di Pisa, anno 1, Nos. 7 and 8. Footnote 43: Trattato di geologia, t. i., Pisa, 1847. The war of independence raged at the time when Pilla was about to visit the north of Europe, in order to complete his studies in practical geology, by comparing the different formations. Every generous heart in Italy beat high at the report of the insurrection of Milan; and the Universities of Pisa and Sienna, by demanding arms and first flying to the scene of danger, shewed that hearts, proved in the fire of science, are prepared for great things. Pilla marched at the head of his pupils, and led them in the path of glory, as he had done in that of philosophy. The love of country and thirst for independence, by subjugating his heart, had stifled the calculation of reason under the impulse and delirium of enthusiasm. He had foreseen the issue of the struggle; for he said to me some days before setting out for the plains of Lombardy, "the hour of our fall has struck. Italy loses by fourteen ages of servitude the splendour of her early days. They are leading us to slaughter; but we must teach our children how to die, in order that they may know how they may one day become free." The University legion formed a small corps which was placed on the right wing of the Piedmontese army, and occupied the positions of Curtatone and Montanara. The principal effort of the Austrian army was directed against these lines, in the affair of the 29th May 1848. Attacked by 13,000 imperial troops, the Tuscans resisted courageously, and did not fall back till they had left 250 of their men on the field of battle. Their heroic resistance paved the way for the success of Goito. Pilla was found among the dead. _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._)