Here again a former thought occurred to me, and I could not but reflect on the pertinacity which in spite of time, which changes all things, man shows in adhering to the old shapes of his public buildings, even long after they have been applied to new purposes. Our churches still retain the form of the Basilica, although probably the plan of the temple would better suit our worship. In Italy the courts of justice are as spacious and lofty as the means of a community are able to make them. One can almost fancy oneself to be in the open air, where once justice used to be administered. And do we not build our great theatres with their offices under a roof exactly similar to those of the first theatrical booths of a fair, which were hurriedly put together of planks? The vast multitude of those in whom, about the time of the Reformation, a thirst for knowledge was awakened, obliged the scholars at our universities to take shelter as they could in the burghers houses, and it was very long before any colleges for pupils (_Waisenhäuser_), were built, thereby facilitating for the poor youths the acquirement of the necessary education for the world.
I have spent the whole of this bright and beautiful day under the open heaven: scarcely do I ever come near a mountain, but my interest in rocks and stones again revives. I feel as did Antæus of old, who found himself endued with new strength, as often as he was brought into fresh contact with his mother earth. I rode towards Palermo, where is found the so-called Bolognese sulphate of Barytes, out of which are made the little cakes which, being calcined, shine in the dark, if previously they have been exposed to the light, and which the people here call shortly and expressively "fosfori."
On the road, after leaving behind me a hilly track of argillaceous sandstone, I came upon whole rocks of selenite, quite visible on the surface. Near a brickkiln a cascade precipitates its waters, into which many smaller ones also empty themselves. At first sight the traveller might suppose he saw before him a loamy hill, which had been worn away by the rain; on a closer examination I discovered its true nature to be as follows:--the solid rock of which this part of the line of hills consists is schistous, bituminous clay of very fine strata, and alternating with gypsum. The schistous stone is so intimately blended with pyrites that, exposed to the air and moisture, it wholly changes its nature. It swells, the strata gradually disappear, and there is formed a kind of potter's clay, crumbling, shelly, and glittering on the surface like stone-coal. It is only by examining large pieces of both (I myself broke several, and observed the forms of both), that it is possible to convince oneself of the transition and change. At the same time we observed the shelly strata studded with white points, and occasionally also variegated with yellow particles. In this way, by degrees, the whole surface crumbles away, and the hill looks like a mass of weather-worn pyrites on a large scale. Among the lamina some are harder, of a green and red color. Pyrites I very often found disseminated in the rock.