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Leonardo seems to have black and yellow jordans luxuriated in the experimental tentativeness of his observations. And also to have enjoyed projecting numerous never-to- be-written '6treatises"_on painting, anatomy, mathematics, optics, and mechanics. Yet this "greatest of great amateurs" had something to add to all the sciences. He amazes us by his reach in all directions. Grand engineering projects also remained unfulfilled. Leonardo had commended himself to Ludovico Sforza as a military engineer and inventor of bridges, with secret plans for "an infinite number of engines of attack and When he returned to Florence in 1503 and found his city at war with Pisa, he offered an ingenious scheme to deprive Pisa of access to the sea by diverting the river Arno. Then he planned an Arno canal to improve Florence's own access to the sea by circumventing the stretch of the river that was not navigable. Neither of these proved feasible, but the modern highway from Florence to the sea was eventually built along the course he had charted. Back in Milan in 1506, he developed a similar grand scheme for making the Adda River navigable, providing a waterway to Lake Como and the sea. In Rome ten years later he explored the draining of the Pontine Marshes. And in his last years with Francis I he proposed a plan to drain marshes for a palace for the king's mother. None of these projects was fulfilled in his time. There is a monumental irony, too, in Leonardo's Nike women air max 2009 white blue sculptural projects. When Leonardo first came to Milan, air max 2011 Ludovico Sforza jordans with yellow blue white black 23s had long been plan- ning an equestrian monument to his father, Francesco. The self-confident Leonardo about 1483 boasted to Ludovico that his sculpture and painting"will stand comparison with that of anyone else, whoever he may be. Moreover, I would undertake the work of the bronze horse, which shall endue with immortal glory and eternal honour the auspicious memory of the Prince your father and of the illustrious house of Sforza." His notebooks for the next years showed scaffolding, lifting devices, and casting methods for the monumental horse, which was to be twenty-three feet high, twice the height of Verrocchio's equestrian statue of Colleoni, and consume two hundred thousand pounds of copper. "Tell me if ever," he asked himselfin his notebook, "anything like this was built in Rome."