Count Platen was the intimate personal friend of Bernadotte, the King of Sweden, and was regarded by him with a feeling little short of veneration. It was Count Platen who undertook and carried through, in opposition to the views of the Swedish nobility, and of nearly the whole nation, that gigantic work, the Grand Ship Canal of Sweden, which connects the North Sea with the Baltic. He died Viceroy of Norway, and left behind him the reputation of one of the greatest men of the century. The few words of kind encouragement which he spoke, on the occasion to which we have referred, sank deeply into the mind of the young mechanician, and confirmed him in the career on which he had entered. Immediately after this interview young Ericsson was made a cadet in the corps of engineers, and, after six months' tuition, at the age of twelve years, was appointed _niveleur_ on the Grand Ship Canal under Count Platen. In this capacity, in the year 1816, he was required to set out the work for more than six hundred men. The canal was constructed by soldiers. He was at that time not tall enough to look through the levelling-instrument; and in using it, he was obliged to mount upon a stool, carried by his attendants for that purpose. As the discipline in the Swedish army required that the soldier should always uncover the head in speaking to his superior, gray-headed men came, cap in hand, to receive their instructions from this mere child. While thus employed in the summer months, he was constantly occupied during the winter with his pencil and pen; and there are many important works on the canal constructed after drawings made by Ericsson at this early age. During his leisure hours, he measured up and made working-drawings of every implement and piece of machinery connected with this great enterprise; so that at the age of fifteen he was in possession of accurate plans of the whole work, drawn by his own hand. His associations with military men on the canal had given him an inclination for military life; and at the age of seventeen he entered the Swedish army as an ensign, without the knowledge of his friend and patron, Count Platen. This step excited the indignation of the Count, who tried to prevail upon him to change his resolution; but finding all his arguments useless, he terminated an angry interview by bidding the young ensign "go to the Devil." The affectionate regard which he entertained for the Count, and gratitude for the interest taken by him in his education, caused the circumstances of this interview to make a deep impression upon Ericsson, but were not sufficient to shake his determination.