The College of Engineering of the University of Cincinnati believes that it has solved the problem for certain fields of activity by ``co<o:>perative courses.'' In these courses the students spend one week in some manufacturing plant and the next week in the college. This weekly alternation of practical and theoretical is kept up for six years. The number of students in the college and the number of workers in the manufacturing plant is kept constant by dividing each group of students into two sections which alternate with each other, so that when one section is at the college the other is at the shop. The college teaches the principles that are necessary for understanding and solving the problems arising from week to week in the shop. As the Dean of the college expresses it, ``It aims to teach the theory underlying the work, to teach the intent of the work, to give such cultural subjects as will tend to make him a more intelligent civic unit.'' It is thought that such co<o:>perative courses could be arranged by schools of different ranks of advancement and <p 271> that the students could spend their alternate weeks in almost any class of industrial or commercial institution of importance. One of the most conspicuous attempts to provide Practical-theoretical experiences of an educative sort is that of the General Electric Company of West Lynn, Massachusetts. This institution has provided a corps of instructors and rooms devoted exclusively to instruction within the plant itself. The theoretical instruction is assumed to be perfectly co<o:>rdinated with the practical. In fact the young apprentice spends much of his time almost daily in constructing commercial articles and under the same conditions that will confront him in later years. His theoretical instruction is thus planned to help him to accomplish his practical task more quickly, perfectly, and with more perfect understanding. The training is so broad that the graduate is prepared to become an industrial foreman in any mechanical establishment. The John Wanamaker Commercial Institute of Philadelphia is a school conducted <p 272> within the store and for the benefit of the employees of the store. In this school theoretical instruction is given that is designed to give the principles underlying commercial life. The results are said to be most gratifying both to the employer and the employees.