The career of Brosius as a teacher of gymnastics, which was to continue without interruption for fifty fruitful years, began in the autumn of 1864, when he undertook the direction of the various classes of _Turnverein_ “Milwaukee.” The regular exercise soon restored his former degree of strength and skill, and a long list of successful appearances in local, district, and national _Turnfeste_ gave evidence of his own merit as a practical gymnast and of his gift for developing a corresponding proficiency in his pupils. In 1866 the Engelmann School, one of the first to introduce physical training into its curriculum, secured a part of his time as teacher, and during the same period he was also conducting the exercises at the Milwaukee Gymnasium, frequented chiefly by native Americans. Then followed a year in Chicago (1870-1871), in the service of the “Aurora” and Scandinavian societies. When the third course of the _Turnerbund’s_ Normal School was opened there, in January of 1871, he became one of the three teachers who directed it. But the great fire of October sent him back to Milwaukee, to open a private gymnasium and take up again his work at the Engelmann School, and in 1873 to resume his former position at _Turnverein_ “Milwaukee.” The next period of his life, and the most fruitful one, opens in 1875, with the transfer of the Normal School of the _Turnerbund_ to _Turnverein_ “Milwaukee.” Brosius became its technical director, as we have seen, and in the ten courses held between 1875 and 1888 more than a hundred teachers of gymnastics were graduated from the institution, to become leaders in _Turnvereine_ all over the country, and many of them to undertake the direction of physical training in important city school systems or in other positions of large influence. From 1875 to 1883 Brosius himself served as superintendent of physical training in the public schools of Milwaukee, and after 1878 as instructor in the National German-American Teachers College (_Lehrerseminar_), which had been established there.[270] The rules in force at the time the ninth course was given in Milwaukee (1885-1886) required that it should last not less than ten months, and should include systematic instruction in the following subjects: Practical gymnastics, gymnastic nomenclature, the value and uses of the different pieces of apparatus, the preparation of series of graded lessons in gymnastics; the history and literature of physical training, including systems and methods, with special attention to modern times; the history of civilization, in connection with the preceding course; the essentials of anatomy and physiology; hygiene, medical gymnastics, and first aid; the principles of education, and practical hints derived from them; the German and English languages and literature; simple popular and _Turner_ songs; foil, sabre, and bayonet fencing; swimming. There was also to be frequent observation of classes