Early in 1857, at St. Pier d'Arena, near Genoa, a series of experiments was undertaken before a select government commission, to examine into the practicability of a project for a mechanical perforating-engine, proposed by Messrs. Grandis, Grattoni, and Sommeiller, for the more rapid tunnelling through hard rock, and with a view to its employment in driving the proposed shaft through the Alps. This machine was to be worked by means of air, highly compressed by hydraulic or other economical means; which compressed air, after performing its work in the perforating or boring machines, would be an available and powerful source of ventilation in the tunnel. These experiments placed so completely beyond any doubt the practicability of the proposed system, that, so soon as August of the same year, the law permitting the construction of the tunnel was promulgated. At this time, absolutely nothing had been prepared, with the exception of a very general project presented by the proposers, and the model of the machinery with which the experiments had been made before the government commission; we cannot, therefore, be much surprised on finding that some considerable time elapsed before the new machinery came into successful operation, the more particularly when we consider the entire novelty of the system, and the unusual difficulties naturally attending the first starting of such large works, in districts so wild and uncongenial as those of Fourneaux and Bardonnêche. Fourneaux was but a collection of mountain-huts, containing about four hundred inhabitants, entirely deprived of every means of supporting the wants of any increase of population, and where outside-work could not be carried on for more than six months in the year, owing to its ungenial climate. Nor was the case very different at Bardonnêche, a small Alpine village, situated at more than thirteen hundred metres (4,225 feet) above the level of the sea, and populated by about one thousand inhabitants, who lived upon the produce of their small patches of earth, and the rearing of sheep and goats, and with their only road of communication with the outer world in a most wretched and deplorable condition. Under these circumstances, we can imagine that the task of bringing together large numbers of workmen, and their competent directing staff, must have been by no means easy; and that the first work of the direction, although of a nature really most arduous and tedious (requiring, above all, time and patience), was also of a nature that could scarcely render its effects very apparent to the world at large for some considerable time. Again, it was necessary in this time to make the detailed studies not only of the tunnel itself, but of the compressing and perforating machinery on the large scale proposed to be used. This machinery had to be made and transported through a country abounding in difficulties. Then, as might be {62} expected, actual trials showed serious defects in the