240. "The gradual destruction of the harborage of Venice, the endless cost of delaying it, the malaria of the whole coast down to Ravenna, nay, the raising of the bed of the Po, to the imperiling of all Lombardy, are but secondary evils. Every acre of that increasing delta means _the devastation of part of an Alpine valley, and the loss of so much fruitful soil and ministering rain_. Some of you now present must have passed this year through the valleys of the Toccia and Ticino. You know therefore the devastation that was caused there, as well as in the valley of the Rhone, by the great floods of 1868, and that ten years of labor, even if the peasantry had still the heart for labor, cannot redeem those districts into fertility. What you have there seen on a vast scale takes place to a certain extent during every summer thunderstorm, and from the ruin of some portion of fruitful land the dust descends to increase the marshes of the Po. But observe further--whether fed by sudden melting of snow or by storm--every destructive rise of the Italian rivers signifies the loss of so much power of irrigation on the south side of the Alps. You must all well know the look of their chain--seen from Milan or Turin late in summer--how little snow is left, except on Monte Rosa, how vast a territory of brown mountain-side heated and barren, without rocks, yet without forest. There is in that brown-purple zone, and along the flanks of every valley that divides it, another Lombardy of cultivable land; and every drift of rain that swells the mountain torrents if it were caught where it falls is literally rain of gold. We seek gold beneath the rocks; and we will not so much as make a trench along the hillside to catch it where it falls from heaven, and where, if not so caught, it changes into a frantic monster, first ravaging hamlet, hill, and plain, then sinking along the shores of Venice into poisoned sleep. Think what that belt of the Alps might be--up to four thousand feet above the plain--if the system of terraced irrigation which even half-savage nations discovered and practiced long ago in China and in Borneo, and by which our own engineers have subdued vast districts of farthest India, were but in part also practiced here--here, in the oldest and proudest center of European arts, where Leonardo da Vinci--master among masters--first discerned the laws of the coiling clouds and wandering streams, so that to this day his engineering remains unbettered by modern science; and yet in this center of all human achievements of genius no thought has been taken to receive with sacred art these great gifts of quiet snow and flying rain. Think, I repeat, what that south slope of the Alps might be: one paradise of lovely pasture and avenued forest of chestnut and blossomed trees, with cascades docile and innocent as infants, laughing all summer long from crag to crag and pool to pool, and the Adige and the Po, the Dora and